Reply by Cosmicsniper

Ken – Sure, you can do that. Just make sure the oil is cures and the surface is clean. If there is a doubt, then bridge to the water-borne finish with a sealer coat of de-waxed shellac.

BTW, the term “water-based” is a misnomer. Water is merely a carrier in these finishes and evaporates off very quickly, allowing the resin and true solvent (glycol ether) to polymerize and cure. Thus, the varnish becomes “borne” out of the water (once it evaporates). So, when you think of it, the water in these fishes is GONE very quickly, leaving nothing to be incompatible with.

-- jay, www.allaboutastro.com