Repair carbon fibre before clearcoat

Carbon fibre surface repair before clearcoat

Guide to preparing carbon fibre before clearcoat

Carbon fibre repair before clearcoat should stay precise and conservative. This guide is for coating-level correction, light sanding marks and faded clear layers, not structural cracks, delamination or broken fibre.

What do you need to prepare carbon fibre before clearcoat?

Cleaning and degreasing

Mipa silicone remover in liquid or spray format removes wax, grease and polishing residue before careful carbon surface preparation.

Controlled hand sanding

MP Finish Pad Soft Superfine P 800 helps refine cloudy or marked clearcoat on carbon contours without aggressive cutting.

Activated clearcoat spray

Mipa 2K Clearcoat Spray high gloss suits smaller carbon parts after the surface has been cleaned and refined.

Scratch-resistant clearcoat system

Mipa 2K-HS Clearcoat CS 90 with Mipa 2K-HS Hardener HS 25 normal and Mipa 2K Thinner Normal V 25 gives a controlled 2K clearcoat method for larger repaired surfaces.

How to repair carbon fibre before clearcoat

  1. 1
    Check the damage type

    Confirm that the problem is faded, scratched or damaged clearcoat rather than cracked laminate or loose fibre.

  2. 2
    Clean thoroughly

    Remove silicone, wax and residue so the sanding pad works on the coating surface only.

  3. 3
    Refine the clear layer

    Sand lightly and evenly until the surface is ready for recoating, avoiding sharp edges and raised weave.

  4. 4
    Clean and inspect again

    Remove all residue and look for exposed fibre, deep scratches or remaining glossy islands.

  5. 5
    Apply new clearcoat

    Apply the chosen clearcoat system in controlled coats and allow full curing before polishing or fitting the part.

Which carbon repair method should you choose before clearcoat?

For coating-only damage

Proceed with gentle cleaning, refinement and clearcoat when the carbon part is sound and the issue sits in the old clear layer.

For larger visible areas

Use the CS 90 method when a spray gun application gives better control over film build and gloss.

For structural damage

Cracked carbon, delamination or soft areas need specialist composite repair before any clearcoat work begins.

Technical details

  • Cleaning, surface refinement and clearcoat application are coating-level steps, not fibre replacement or structural laminate repair.
  • A uniformly dull prepared surface gives clearcoat a better chance to flow evenly and bond correctly.
  • Do not chase deep marks through the clear layer into the weave; stop and reassess if fibres become visible.
  • Activated 2K coatings need controlled working time, suitable ventilation and appropriate protective equipment.
Practical suggestion

Treat carbon fibre like a visible finish, not like ordinary filler work. Remove the minimum amount of material needed to make the new clearcoat bond.

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