Weather Observation with Raspberry Pi – Vol4 Painting Metal
I kept painting on only wood, but time has come… the time to paint on metal!
Painting Metal
The way to paint on metal and plastic is different from the way to paint on wood. We can’t use brushes! If you use brushes, they make striped pattern.
Durability is another concern. Oil-finishing and dye-based paints harden wood at the same time so that the paint itself doesn’t come off easily. This doesn’t happen when we paint on metal. Paint can’t soak into metal or plastic. This means paint itself has to harden.
I bought this one.
The explanation says:
Not suitable for these materials: Aluminum, Stainless, Plastic, Styrofoam, and glass
This means my case is not suitable. I think the paint would be repelled or don’t stick to the surface. I found the solution soon by searching. I needed to spray primer first.
Primer is an undercoating paint. This primer is for metal except steel. There are primers for wood and plastic so you have to buy an appropriate one.
The explanation says:
This metal primer is good for undercoating materials such as copper, brass, aluminum, stainless, chromium, zinc, and tin.
I tried right away. I didn’t sand before painting, but sanding may be a good idea.
Sand the surface before painting. Use #100 or #200 sand papers and sand gently. Pay attention not to add too much stress. You would make deep scratches. – Dummy’s Making original effector P.127
The color became darker.
The instruction says “Paint thinly for 2 or 3 times”, so I painted twice.
And then I sprayed the black one.
When I painted the first time, I forgot to take pictures.
The paint is dripping. 🙁 I guess I sprayed too much.
The surface is, including the dripping part, really tough. Even if I scratched the paint with my nails, the paint didn’t come out at all. I couldn’t make scratches too. Very good!
This post is also available in: Japanese
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