sealing with BIN ?

[fishing bum wannabe]

I use it and don't find that there is any penetration. I think it is more a surface primer that should be used after sealing (if you feel sealing is necessary). As a primer it dries quickly, bonds to the wood well, bonds to following layers of airbrushed paint well and there aren't the nasty odors you get with non water based paint. It can be sprayed if thinned but it will clog your airbrush. If you decide to spray it on use some kind of inexpensive external mix brush/gun or you will find yourself spending a lot of time cleaning your airbrush. Remember it dries fast and is tough to get off.