The surface of aluminum alloy is very smooth, which causes most paint to fall off after spraying, and the adhesion is not good, so aluminum alloy needs to be sprayed with special paint.

Substrate treatment: aluminum alloy substrate should be polished and oxidized. The surface shall be derusted and degreased, and kept clean, dry and free of dirt. Paint can only be sprayed after dust is removed and filled, and the substrate must be dry before spraying.

Mainly distinguish between water-based paint and oily paint, because there are several kinds of water-based paint, among which acrylic water-based paint can be washed directly with ethanol or methanol, and the designated part of water-based paint can be removed.