if the scratches are not too deep you can use automotive spray putty, then wet sand. If there are minor chips or deeper scratches you can mix epoxy glue or resin with filler powder or graphite ( ground pencil)
powersloshin said.. if the scratches are not too deep you can use automotive spray putty,T then wet sand. If there are minor chips or deeper scratches you can mix epoxy glue or resin with filler powder or graphite ( ground pencil)