HVLP Paint Spraying

[sfry]

This could take all day.
Sanding Base: Basecoat/Clearcoat is considered a chemical adhesion process. When you sand the base you have now changed the chemistry to think its a mechnical adhesion. IT wont fly! You will have a basecoat delamination. The reason is that when you apply the base is will go through a process called a polyvinyl resin flotation. This is a seperation between pigment and binder. The pigment is heavier than the binder thus resulting is in a setteling of the pigment at the bottom of the film layer. The binder is the glue that holds the pigment togeather and promotes the adhesion between the base and clear, it raises to the top of the film. THIS IS WHAT YOU SAND OFF. And no it does not replace it when you apply more base. The key to remember is when you have to sand base, keep it to the size of the particulate you are removing. NEVER SAND THE ENTIRE JOB. I have been called to look at more warrantys due to this issue.

I will talk about HVLP Vs Conventional spray equipment in another thread.
G.Shannon Fry