Rather then primer, what about Sig Finishing Resin?  Use a thin coat just for filling grain in the balsa then light sanding then on to color.  Anyone tried that and what was the out come.  I am finishing a Curare, all balsa, and do not want to Monocoat so elected to fill the grain with finishing resin then add the color paint.  Also what  brand of paint.  Automobile paints are no doubt the best but the price and wast is somewhat prohibited.  By the time get another plane ready to paint, shelf life has expired and about 50% of what you purchased is toast. Krylon is cheep and could cover the entire plane with a couple of coats with no more then two cans.  Then a couple of trim colors and get the whole thing painted for under $20 vs. $150 of automobile paints and $100 is wasted..  I have heard Krylon is also fuel proof but have no first hand knowledge. How about opinions? Is it sandable in case of mistakes?</p>