Sportflyer
I need enlightenment (I have never had the difference explained) on the difference between Nitrate and butyrate dope.

I work with "weak dope" which is "strong dope" thinned out somewhat. I also have "non-shrink dope". Oh, "strong dope" is like well thinned out balsa cement. I use amyl acetate as a plasticiser (damned dangerous that stuff is too...) in very small quantities.

For this purpose I always used thinned 50/50 weak dope. Thinners? Acetone/toluene mix. No plasticisers, no fancy stuff, I want that sealer to get well into the balsa surface.