How to spray paint?
3 Answers
Before spraying, ensure that the aluminum alloy surface is free of dust, stains, and excessive moisture, as these can affect the overall finish. Additionally, after spraying is completed, avoid contact with water and allow it to dry for approximately 72 hours before use.
Painting is actually quite a meticulous process. I've done it myself a few times and here's the workflow I've summarized: First, sand the area to be painted smooth using 400-grit sandpaper. Then, protect the surrounding areas with masking tape. Before spraying, remember to thoroughly clean with degreaser to avoid bubbling. Apply the paint in 3-5 thin coats, allowing 15 minutes drying time between each. Wait half an hour after the topcoat before applying clear coat, then let it dry in a ventilated area for 48 hours. The key is to wear a mask and goggles, with the ambient temperature ideally around 20°C – too high humidity can cause water marks. Keep the spray can 20cm away and move at a steady speed, applying it as evenly and smoothly as sketching.
Car painting requires some patience. I've seen professionals operate: first treating scratches and rust spots, filling dents with body filler, then sanding smooth after it dries. The cleaning step is crucial - using special degreaser to remove oil films. Primer should be sprayed thin and even, usually two coats suffice. Basecoat must match the factory color code, applied in zigzag sweeping motions to avoid runs. When applying clearcoat, watch the number of layers - too thick will cause yellowing. Don't wash the car for three days after painting to allow full curing. Beginners should practice on scrap panels first to avoid color mismatch and orange peel texture.
