Treatment of Metal Surface
Treatment of Metal Surface1. Filling/drying
Small cracks or pinholes in the sheet metal should be repaired with a body filler and sanded flat and smooth.
- Use the 2- part polyester resin putty.
- Mix the putty with the hardener in the correct ratio.
- Follow the body filler manufacturer's instructions.
- Mix the body filler and hardener quickly.
- Apply the body filler in several thin coats, without air bubbles.
- Do not try to cover the surface with one heavy coat.
- Apply the body filler over the damaged area with a putty knife using light pressure.
- After applying the body filler, allow 5-6 minutes of normal drying time, then force dry it with infrared lamps or other industrial dryer at 50 degrees C (122 degrees F) - 60 degrees C (140 degrees F).
NOTE: Follow the body filler manufacturer's instructions for drying time.
2. Polishing
The body filler is dry a white mark appears when the surface is scratched with your finger nail.
-1. Throughly sand the body filler surface.
Use the double action sander and #80-#120 disc paper.
-2. Sand the surface evenly, particularly at area of the body filler.
Use the flexible block and #120-#180 sandpaper.
-3. Featheredge the paint coat.
Sand the body filler surface until the proper dimension are met.
Use the double action sander and #240-#320-#400 disc papers.
3. Air blowing / degreasing
Use alcohol, wax, and grease remover.
Also clean and degrease surfaces where masking tape will be attached.