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Problem

What grit for copper pipe before painting?

Paint may not bond to copper pipe if oxidation or gloss remains.

metal paint primer dry sanding
Answer

For copper pipe before painting, clean first, scuff with 220 or 320, then use 400.

Why it happens
Copper needs cleaning and light scuffing before metal primer or paint.
Recommended grit
Use 220 or 320 for scuffing, then 400 for smoother visible prep.
Wet or dry
Dry.
Success check
The copper is clean, dull, and ready for primer.

What to do

  1. Clean oxidation and residue from the copper pipe.
  2. Scuff with 220 or 320.
  3. Refine visible areas with 400.
  4. Remove dust before primer or paint.
Avoid: Do not paint over oxidation or grease.

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