SONAX PROFILINE OS "04-05" High-Gloss Polish (One-Step) 250ml

Paint correction and high gloss in a single pass — the PROFILINE OS "04-05" put to work

What does the SONAX PROFILINE OS "04-05" do? This one-step polish pairs medium cut with strong gloss — scratch correction and finishing in one pass, silicone-free and machine-ready for pro detailing and reconditioning work.

In pro reconditioning, efficiency feeds straight into the bottom line. A polish that delivers correction and finishing in a single pass doesn't just save time — it also cuts machine effort, pad wear and the fiddly swapping between polishing stages. The SONAX PROFILINE OS "04-05" was built for exactly that: a one-step polish with medium cut and strong gloss that corrects scratches and lays down a deep high gloss in one machine pass. Available in 250 ml and 1000 ml, silicone-free formula — made for pro detailing and bodyshop use.

• Correction and finishing in one pass for efficient turnaround. If you want to polish lightly to moderately scratched paint without running two separate stages, the OS "04-05" handles both jobs in a single session. The time saved per car is real — especially in a commercial setting, where every hour you claw back goes straight to the margin.
• Medium cut corrects fine to medium scratches without eating into the clear coat. The abrasiveness is dialled in to clear holograms, wash marring and fine to medium oxidation with confidence. For most cars in everyday condition this cut is plenty — without needlessly burning through precious clear-coat thickness with abrasives that are too aggressive.
• Silicone-free formula for bodyshop use with no contamination risk. Silicone in care products is a headache for paint jobs: it stops top coats and clear coats from keying, and a quick clean rarely gets it fully off. The silicone-free formula of the OS "04-05" makes it a fit for bodyshops that go on to touch up or repaint the cars they've reconditioned.

Detailing1's tip from the shop: The OS "04-05" gives its best on a medium foam pad on a dual-action polisher. Lay the product down evenly across the panel at low speed, then bring the speed up for the working pass. When the polish turns from cloudy to clear as you work it — a telltale sign the abrasives are breaking down — that's the sweet spot to buff off. Switch to a clean microfibre for the buff and check the result in raking light.

The OS numbering explained — what 04-05 tells you about cut and gloss

SONAX labels its PROFILINE polishes with a pair of numbers that tell you straight away what the product does: the first number is the cut, the second is the gloss. The scale runs from 1 (minimal) to 6 (maximal). That puts the OS "04-05" at medium-to-strong cut with high gloss to match — an ideal combo for a one-step approach: enough bite for real correction work, enough gloss for a finish you can show off.

The "OS" in the name stands for "One-Step" — the idea of rolling cut and gloss into a single product. Classic two-step workflows start with a heavy-cut compound that mechanically removes scratches, then follow with a finishing polish that clears holograms and builds depth. The OS line drops that second step: the abrasive particles cut aggressively at first, then break down into smaller particles that create the final finish.

The SONAX PROFILINE range has several OS variants built for different starting points and paint conditions. The PROFILINE OS "02-06" has less cut (02) with even higher gloss (06) and a built-in wax sealant — it's the right call for near-new or already reconditioned paint that only needs a care polish with no real correction. The OS "04-05" cuts harder and is aimed at paint in typical everyday condition with fine to medium scratches.

The idea of breaking-down abrasives — known as diminishing abrasives — is a make-or-break factor for the quality of a one-step polish. Cheap products with fixed abrasives cut evenly aggressive from start to finish; the leftover on the buff can then leave coarse polishing marks in the paint that force a follow-up finishing step. With the OS "04-05" the abrasives break up more and more under pressure and heat, get progressively finer, and automatically create a finer surface by the end of the pass. That physical process is the core reason pro-grade one-step polishes work — and why cheap all-in-one polishes can't replace them.

Using the one-step polish — a machine-friendly workflow for DA and rotary

The OS "04-05" is built for machine application. By hand you'll barely get a one-step polish with this cut to work properly, because the pressure and speed for full scratch correction just aren't there. In a pro setting you're reaching for either a dual-action polisher or a rotary — both work with the OS "04-05", but they give different results.

With the dual-action polisher (DA), the margin for error is far bigger than on a rotary: the random motion of the DA stops holograms and swirls from forming, even if the machine dwells a moment longer in one spot. That makes the DA the go-to for anyone stepping into machine work and for shops that want high throughput with a consistent result. A medium foam pad in the 135–145 mm range is the one to reach for with the one-step polish on a DA.

With a rotary you get more cut from the same polish — and on heavily scratched paint that can make a real difference. The rotary asks for more experience, because overheating and holograms are on the table if the pad and movement speed aren't right. A softer pad than you'd run on the DA helps keep the hologram risk down. For experienced detailers the rotary paired with the OS "04-05" is a very fast combo for correction work.

Getting the amount right is an underrated factor: too little polish on the pad dries out too fast and won't cut evenly. Too much flings off the pad at high speed and just wastes product with nothing to show for it. As a rough guide: about four to five pea-sized dots on the pad for a standard panel like a bonnet or driver's door. Before the first pass, spread the pad slowly over the panel before you bring the speed up.

Pad care between panels is another quality factor that's easy to overlook day-to-day. A caked pad with dried-on polish residue cuts worse than a fresh one and can even put scratches into delicate surfaces. In a pro setting a pad washer or a pad cleaning brush pays off, so you can clean the pad regularly through a long detailing session. Otherwise, keep a stack of pads on hand so there's always a fresh one ready without breaking your flow.

Where it works and where it stops — which paints and scratch patterns suit the OS "04-05"

The OS "04-05" covers the widest working range in the PROFILINE one-step line. Cars in normal everyday condition — parking marring, wash swirls, fine holograms from earlier work, light weathering oxidation — are ideal candidates for the OS "04-05". In these cases a single pass is enough to bring a clearly better gloss level and a cleanly corrected surface.

The OS "04-05" hits its limit where deep scratches or heavily oxidised clear coats call for more cut. A deep scratch that catches your fingernail as you run it over reaches into the base coat or even through the clear — here you need a heavy-cut compound before a one-step polish makes any sense. On heavily matted surfaces with pronounced clear-coat oxidation, it also pays to start with an aggressive compound like the PROFILINE Cut+Finish "5/5" to prep the surface before the OS "04-05" takes over the finishing.

The OS "04-05" has proven itself especially for used-car intake and trade-ins: cars with no known reconditioning history, where you have to judge the paint without a lengthy inspection, are quick to size up with a test panel. If the one-step polish visibly clears scratches and builds gloss on a test area, the cut is enough. If it doesn't, it's clear a more aggressive product is needed first.

One thing that matters for commercial use: always run the test panel on a low-visibility spot — the B-pillar, say, or the lower edge of a rear door — so an unexpected result leaves no visible damage on a main panel. For shops that regularly work on cars of unknown origin and prior treatment, a structured polishing triage is a must: decontamination first, then the test panel, then the call on which product to run for the full detail. That approach heads off costly mistakes and gives the customer a consistently good result.

On high-gloss paint in darker colours — black, anthracite, dark blue — polishing marks show up especially clearly. If you spot holograms on these tones after the pass, you can optionally add a short refining step with a soft finishing pad and the lighter PROFILINE NP "03-06" to clear any remaining fine marks and deepen the gloss a touch more. In most cases, though, that's not needed on light to medium tones — with the right pad the one-step polish leaves a hologram-free, deep high-gloss result right off the bat, ready to show.

The OS "04-05" in context — where it sits in the PROFILINE polish matrix

The SONAX PROFILINE polish range has the right product for every level of correction. To make the right call, it helps to look at the whole spread: on one side the heavy-cut compounds with high cut and low gloss, on the other the finishing polishes with minimal cut and maximum gloss. The OS products sit across that as one-step solutions: they skip the highest cut grades but pair practical correction with good gloss numbers.

Head to head with the OS "02-06", the difference is clearly the situation you're in: the OS "02-06" is a care polish with wax sealant for regularly maintained cars that need no correction — it shines beautifully and seals at the same time, but has next to no bite for scratches. The OS "04-05" is the one-step answer for cars that need real correction. If you're working fleet cars that have picked up clear marks between intervals, you reach for the OS "04-05".

Against a classic two-step workflow with Cut+Finish "5/5" followed by a finishing polish, the OS "04-05" saves time at the cost of maximum correction depth. If you want to bring a car up to show-car level, there's no getting around the two separate steps. For the everyday detailing operation that does several cars a day in reasonable time and wants a good — but not perfection-chasing — result, the OS "04-05" is the more economical call.

A practical decision framework for picking the polish: if the car after washing and decontamination shows only fine wash swirls under an LED lamp and no deep scratches — the OS "04-05" is enough. If deep individual scratches or patches of heavy oxidation are present — start with Cut+Finish or a heavy-cut polish, then optionally finish with the OS "04-05". If the car was freshly reconditioned only a few months back — the OS "02-06" for care with no real removal. Those three scenarios cover the bulk of daily reconditioning work, and for the middle case the one-step polish with the 04-05 rating is usually the right answer.

Buying advice — who the SONAX PROFILINE OS "04-05" is right for

The SONAX PROFILINE OS "04-05" is the polish for pro detailers who work cars every day and want a reliable one-step solution for the standard case. Dealerships, used-car traders, rental fleets and mobile detailers all benefit from a product that delivers a clean result in a single pass on typical everyday condition. The 1000 ml bottle is made for continuous use; the 250 ml bottle suits the individual user or testing before a bulk order.

The silicone-free formula also makes the polish a fit for shops that offer both detailing and paint repair under one roof. If you take reconditioned cars into the spray booth afterwards or do partial repaints, you have to be sure that polish residue won't cause fish-eyes, wetting problems or adhesion issues in fresh top coat. With the silicone-free formula of the one-step polish, that risk factor is reliably off the table.

As a verified SONAX dealer, Detailing1 stocks the one-step polish in both bottle sizes and is happy to help pick the right one-step product for your particular use. If you're unsure which OS variant suits your needs better, the best move is to describe the typical paint condition of the cars you work on — then we can make the recommendation precise. For shops new to the PROFILINE polish range, the 250 ml bottle is the sensible way in, to dial in pad choice and machine settings on a test car before ordering the 1-litre bottle for full-time use.