What do you think of the BABY POWDER and spray lacquer method of finishing HL balsa skinned wings?
From : Don Stackhouse Baby powder is primarily talc. It’s ground up rocks. We use it in gel coats for mold making sometimes. The first time you pick up a carton of the stuff you will change your mind about the wisdom of using it for filler! It’s VERY heavy. The reason it seems lighter in the form of baby powder is because it’s fluffed up and full of air, but when you add the lacquer you replace all that air with paint. Microballoons instead of baby powder would be lighter, but the times I’ve tried that technique the results haven’t been all that impressive. If you’re trying to achieve a glass smooth surface (which, as I mentioned in my post to RCSE, really doesn’t accomplish anything aerodynamically on most HLG’s), then fillers can be helpful, but the bottom line is that anytime you add more stuff to the surface you are adding more weight. Do you believe that the VARATHANE is a lighter and/or better way to go? In my experience, yes. Trying to add fillers to the Varathane doesn’t seem t
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