Paint 3D printed plastic parts

Guided shopping for 3D printed plastic parts

Guide to painting 3D printed plastic parts

3D printed plastic parts often show layer lines, support marks and small surface defects before paint. A good finish comes from cleaning, controlled sanding, primer filler where needed and a plastic coating choice that suits the print material and the way the part will be handled.

What do you need to paint 3D printed plastic parts?

Cleaning after sanding

Mipa silicone remover liquid or spray removes grease and residue after normal dust removal. Use it before primer so sanding dust and hand oils do not sit under the coating.

Fine contour sanding

MP Non-woven Sanding Pad Very Fine red helps key curved prints, small housings and detailed surfaces without flattening every shape aggressively.

Plastic adhesion primer

Mipa 1K Plastic Primer supports adhesion on many rigid plastics and is used when the prepared print needs a dedicated bonding layer before colour.

Primer filler for layer lines

Mipa 1K Plastic Primer Filler in spray or 1l format helps reduce layer lines, shallow scratches and small print texture before the final finish.

Plastic finish coat

Mipa Plastic Paint Spray creates a matt plastic colour finish, while Mipa Bumper Paint Spray or Mipa Bumper Paint 1l creates a textured grey or black plastic effect.

How to paint 3D printed plastic parts

  1. 1
    Remove print defects

    Cut away supports, smooth sharp support marks and remove loose strands before any coating work starts.

  2. 2
    Sand and clean

    Sand layer lines to the required smoothness, then remove dust. Use Mipa silicone remover after dust removal so contamination does not remain under primer.

  3. 3
    Prime for adhesion

    Use Mipa 1K Plastic Primer on suitable prepared plastic when an adhesion layer is needed before the filler or finish.

  4. 4
    Level visible print texture

    Apply Mipa 1K Plastic Primer Filler to reduce layer lines and small surface marks. Sand again after drying until the surface is even enough for colour.

  5. 5
    Finish with light coats

    Apply plastic paint or textured finish in thin coats. Let the part cure before assembly, handling or installing screws into printed holes.

Which 3D print painting approach should you choose?

Display parts

Use primer filler and careful sanding when the print will be viewed close up and layer lines would distract from the finished piece.

Functional housings

Use a light coating build around screw holes, clips and mating faces so the printed part still assembles after painting.

Textured hiding finish

Use a textured bumper style finish when the part can accept a structured look that helps disguise minor layer texture.

Technical details

  • Mipa 1K Plastic Primer Filler is a fast drying plastic primer with filling properties for prepared plastics such as ABS, PC, PMMA, PA, PUR, PVC and GRP.
  • Mipa 1K Plastic Primer supports adhesion on many rigid plastics, but the exact print material should be tested before a full visible coating.
  • Mipa Plastic Paint Spray is an elastic matt topcoat for suitable plastic surfaces and is applied in light coats from spray distance.
  • Mipa Bumper Paint Spray creates a textured finish that can help hide minor surface texture on suitable rigid plastic parts.
  • Printed holes, clips, threads and mating edges should stay lightly coated or masked so the finished part still fits.
Practical suggestion

Print or keep a small test coupon in the same material and finish it first. A test piece shows sanding depth, primer build and colour appearance before the real printed part is coated.

© 2026 All Rights Reserved.

0