I ran out of Liquid White and couldn't find an online source (although now I see Walmart is selling it, at a hefty price). I mixed a substitute: 1/2 Titanium White and 1/2 linseed oil, per online advice. I eyeballed it; it was too thin, but worked, more or less. I think saw guidance about what the texture should be -- I need to find it again. I ended up throwing out what I didn't use. It wasn't a lot, but I did regret doing it.