To use this homemade filler, you will be working with two dangerous materials: fine balsa dust and model airplane dope. I won't go into detail about the dangers of either. Here is an MSDS for nitrate dope: http://www.setonresourcecenter.com/m...b/wcd00bdf.htm

Here is an MSDS for balsa dust:
http://www.baltek.com/data/pdfs/safety/MSDSDUST.pdf

I've used commercial model fillers for many years and would be hard-pressed to find anything better. They sand easily, are easily applied, don't shrink and can be thinned with water to any consistency desired. They're also water-soluble and much less hazardous.

Dr.1