Chemical Guys C4 & P4 Paint Correction Kit, 2 x 16 oz — Heavy-Cut Compound + Finishing Polish for Mirror Gloss

Chemical Guys C4 & P4 is a two-step paint correction kit that removes heavy defects with C4 compound and finishes to mirror-like gloss with P4 polish.

This kit combines a heavy-cut correction compound and a refined finishing polish to restore automotive paint. C4 Clear Cut Correction Compound is formulated to remove deep scratches, heavy swirl marks, oxidation and other visible defects, while P4 Precision Paint Perfection Polish eliminates micro-marring and holograms left after compounding. Both formulas are designed for use with dual-action and rotary polishers or for controlled hand application, and they’re safe on clear coats, single-stage paints, and even vehicles with ceramic protection.

How aggressive is C4 at removing deep scratches and swirls?

C4 is built as a strong-cutting compound to rapidly level paint and eliminate significant defects that lighter polishes can’t address. It uses advanced abrasives that lift and smooth damaged clear coat without leaving excessive dust or residue, preparing the panel for the finishing step.

• Engineered for heavy cutting and fast defect removal
• Reduces oxidation, towel marks, and acid rain etching
• Minimizes dust compared with older abrasive formulas
• Works with dual-action, rotary, or by hand for versatility

What does P4 do after compounding?

P4 is a refining polish designed to remove the micro-marring and holograms that compounding can produce, delivering a deep, clear reflection and improved color depth. It’s applied as the second step to enhance gloss, smoothness, and overall visual clarity of the paint surface.

• Refines surface after heavy compounding
• Removes haze and light holograms for a mirror finish
• Boosts color vibrancy and depth of gloss
• Compatible with both machine and hand applications

Can I use this combo on ceramic-coated or single-stage paint?

Yes — both C4 and P4 are formulated with versatility in mind and are safe for clear coat, single-stage, and ceramic-coated surfaces when used correctly. On ceramic coatings, correction should be done carefully and professionally; always test an inconspicuous area to confirm desired results before treating an entire panel.

• Suitable for clear coat and single-stage finishes
• Can be used on ceramic-coated vehicles with caution
• Recommended to test in a small area before full application
• Works with DA and rotary polishers or hand pads

How do I get professional results with this kit as a DIYer?

Follow a methodical two-step workflow: compounding with C4 to remove major defects, then refining with P4 to restore gloss and clarity. Use appropriate pad selections, moderate speeds, and overlapping passes; wipe residue between steps and inspect under good lighting for consistent correction.

• Start with clean, cool surfaces and wash thoroughly
• Use cutting pad for C4 and a finishing pad for P4
• Work in 2x2 foot sections, checking progress regularly
• Finish with a proper paint sealant or wax for protection

Who is this for: The Chemical Guys C4 & P4 kit is aimed at car enthusiasts, weekend detailers, and professional detail shops that need a compact, two-step correction system. It’s ideal for anyone restoring neglected paint or refining a show car’s finish who wants workshop-grade correction without sourcing individual compounds and polishes separately. If you want a practical kit to remove heavy defects and finish with high gloss while retaining control over machine or hand application, this bundle is a solid, all-purpose choice.