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Heavy Cut
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Complete Compound
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ACA 500 X-Tra Cut
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DA Microfibre Correction Compound
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UltraCut
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Car compounds are designed to remove deeper paint defects by cutting into the clear coat. Swirl marks, scratches, sanding marks, and oxidation sit below the surface. Compounds use stronger abrasives than polishes to level those defects, restoring a flat, even finish. If polishing refines, compounding does the heavy lifting.
Compounds remove. Polishes refine. Both are needed for a proper correction result.
Compounds use more aggressive abrasives than polishes to reach defects that sit below the surface of the clear coat. Swirl marks, sanding marks, scratches, and heavy oxidation all require this level of cut before any refining can take place.
A polish improves clarity and gloss on paint that is already in reasonable shape. A compound is what you reach for when polish alone cannot remove the defects. This is the step that levels the surface before any refinement can begin.
Compounds leave behind a level of haze or micro-marring that needs refining. Think of compounding as clearing the damage, not completing the job. A finishing polish after compounding is what creates the actual gloss and clarity you are working towards.
Compounds are the most aggressive correction tool. Understanding their limits prevents poor results.
Match the cut level to the defect severity. Start less aggressive than you think you need to.
Maximum cutting power
Maximum cutting power for deep defects, sanding marks, and heavily damaged paint. The most aggressive option, always followed by polishing.
Highest aggressionBest starting point
A balance between correction and finish. Removes moderate defects with less haze than a heavy cut. Often the right first step on average paint in average condition.
Recommended startVersatile option
Starts aggressive and breaks down into finer abrasives as you work. Can cut and partially refine in one process depending on technique and pad choice.
Technique dependentPredictable and consistent
Maintains a consistent cut level throughout the entire working time. More predictable, but almost always requires a separate polishing stage afterwards.
Consistent cutSkipping the polishing stage is why most people end up with a dull finish after correction.
This is where most people get it wrong. Compounds remove heavier defects but leave the surface corrected rather than finished. Polishing removes the haze and restores clarity. Protection locks in the result. Skipping step two is the most common reason for a dull or hazy finish after what should have been a full correction.
Remove the defects
Uses heavy abrasives to level deeper defects in the clear coat. Removes the damage but leaves a haze behind. Corrected but not finished. This is not the final step.
Correct aggressivelyRefine the finish
A finishing polish removes the haze and micro-marring left by the compound. This is the step that creates the actual gloss and clarity. Never skip this after compounding.
Refine and restoreLock in the result
After polishing, the surface is completely bare. Wax, sealant, or ceramic coating must go on immediately. Without protection, the corrected finish begins deteriorating almost at once.
Wax, sealant, or coatingFive scenarios, five clear directions. Start lighter than you think you need to.
Go for a heavy cut compound. This level of damage cannot be removed by anything lighter. Apply by machine, work methodically, and plan to follow with a medium or finishing polish to bring back full clarity.
A medium cut compound is usually enough and the better starting point. It removes moderate swirl marks and oxidation with less residual haze, making the finishing stage faster and easier. Start here before reaching for a heavy cut.
Choose a diminishing abrasive compound. As it breaks down during use, the cut level reduces, leaving less haze to deal with. With consistent technique, it can reduce the work needed in the finishing stage without sacrificing correction.
Go with a non-diminishing compound. The cut level stays constant throughout, making results easier to predict across multiple panels. Plan for a dedicated finishing polish stage after, as non-diminishing types do not self-refine.
Always start less aggressive than you think you need to. Test a small inconspicuous area with a medium cut before committing to the whole panel. You can step up aggression if the results fall short, but you cannot put clear coat back once it has been removed.
Four mistakes that damage paint, reduce results, or leave you with more work than you started with.
Starting with a heavy cut compound when a medium cut would have done the job removes more clear coat than necessary. There is a finite amount of clear coat to work with. Always test with a less aggressive product first and only step up if the results genuinely require it.
This is the most common reason for a dull or hazy finish after correction. Compounds leave micro-marring that needs refining. Stopping after compounding means the surface looks corrected but not finished. A finishing polish is not optional, it is what creates the actual gloss.
The pad you use affects the cut level just as much as the compound itself. A heavy cut foam pad with a medium compound produces a very different result than a finishing pad with the same product. Matching compound aggression to pad type is as important as choosing the right product.
Working a compound until it dries out reduces its effectiveness. Stopping too early before it has broken down properly produces uneven results. Follow the product instructions for passes and pressure, and work one panel at a time to maintain consistency.
Compounding is only step one. These four steps finish what it started.
Check the panel under a strong single light source before moving to the next stage. Haze, missed areas, and remaining defects are easiest to spot now. It is far easier to go back over a section before polishing than after protection has been applied.
This is not optional. The haze left by compounding needs a finishing polish to restore full clarity and gloss. Use a light finishing polish by machine or by hand, working the same areas you have just compounded. This is the step that creates the actual shine.
Both compounds and polishes leave residue and oils on the surface. Wipe down with a clean microfibre panel wipe before applying any protection. This matters most for ceramic coatings, which need a completely clean, bare surface to bond correctly.
After polishing, the surface is completely exposed with no protection at all. Wax, sealant, or ceramic coating must be applied before the car gets wet or is exposed to contamination. Leaving corrected paint unprotected undoes the work almost immediately.
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No. Compounds are only needed for heavier defects. If the paint has light swirls or is in good condition, you can go straight to polishing.
You can, but it’s limited. Compounds are designed to work with machine polishers. By hand, you’ll struggle to remove anything beyond very light defects.
Only if the scratches are within the clear coat. Deeper scratches that go through the clear coat won’t be fully removed, only reduced.
Yes, if done properly. But it removes a small amount of clear coat, so it should be used carefully and only when needed, not as a regular step.
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