Distilled Water?

[nachoman]

Quick question.

On my small collection of Polly Scale paints it says to use Distilled Water when thinning paints for airbrushing at a ratio of 4 parts paint, 1 part water? Is it necessary to use distilled water or will just plain ol' tap water be fine?

If you have hard water, you may cause slight discoloration of the paint. I doubt tap water anywhere is hard enough to cause precipitation of solids or chemical reactions when mixed with the paint. I use tap water (actually I just did 10 minutes ago) and don't worry about it. You can get distilled water at the supermarket, a buck or two per gallon, and it could last you forever if this is all you use it for.