| 
	
		
		
		
		 I use Zinsser Seal Coat sanding sealer for prototypes because it dries so quickly and I'm only going to test a proto' for a few minutes.  It's shellac-based so water will eventually permeate it.   
 
It also has denatured alcohol for a solvent, which means I have to be careful with it -- it's pretty poisonous. 
		
		
		
		
		
	 |