Can you mix oil paints and vegetable oil and will it still dry properly?

ummm....yes, well...petroleum products are not actually part of fine oils. The pigments are ground in one or more of several seed oils that will catalize and harden when exposed to oxygen. Vegetable cooking oils will not harden with oxidation, but will merely become gummy. So...the upshot is....automotive lubricants and oil paints are unrelated (!!??) and you can't use crisco to paint with either.

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