Hello y'all, I wanted to reply with a word of warning about using baking soda for anything having to do with modelling. Hear ye, my tale of woe... When I was just a young turd I used baking soda mixed with whatever appropriate color paint to simulate mud, rust, whatever...mostly lacquers. Anyhoo, one day I noticed a gunky, resinous substance--like an oil "sweating" out of my models. It pretty much ruined half my collection. To make a long, sad story short, I eventually wound up calling Mr Armand Hammer's company as well as Testors paint and after much discussion, we finally came up with the conclusion that baking SODA ( I dont know if this applies to POWDER) is far from a chemically inert substance-- and not something that plays nice with other random chemicals. In my case it seemed to break down the paint pigments and ooze 'em all over my tanks. Now, I wrote this hint/warning into FSM years ago and a few guys swore blue that they naver had any problem and that my facts weren't conclusive, yada yada...All I'll say is that I stopped using the stuff and have NEVER had another ruination as such, so...But I'll bet that if your'e gonna seal that dio with lacquer, your'e tempting fate. So, if you never had any problem with it--great! But I'll never touch the stuff again!