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 122 degrees F (50 degrees C) - 140 degrees F (60 degrees C).
NOTE: Follow the body filler manufacturer's instructions for drying time.
2. Polishing
The body filler is dry when 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 the area that was filled.
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 #24O'#32O #400 disc papers.
3. Air blowing/degreasing
Use the alcohol, wax and grease remover.
Also clean and degrease the surfaces where masking tape will be attached.