This is a product I use all the time. It is cut with alcohol. You can clearly smell the denatured alcohol in it. I don't see how there can be an oil in it, you can topcoat over it within a couple minutes or even add it to lacquers as a toner.
Steve, are you sure your talking about a penetrating stain??? I use it too, but I never used alcohol to cut a penetrating stain. Penetrating stains are oil based products. I dont see where alcohol is recommended:
Copy and Pasted............
Mohawk Finishing Products
Division of RPM Wood Finishes Group, Inc.
Product Data Sheet
Penetrating Oil Stain
Directions: Surface must be clean, dry and wax-free. Finish sand with 150 to 180 grit paper for desired result. Remove sanding dust with tack cloth or vacuum. Penetrating Oil Stain may be brushed, wiped or spray applied (approximately 30-35 psi). Stain should be applied with the grain in a wet uniform consistency. Allow the stain to penetrate; then wipe off excess stain with a lint free cloth. Penetrating Oil Stain can be reduced with M650-004 Mohawk Naphtha or M650-230 Mohawk Mineral Spirits to adjust color strength.
Use M650-230 Mohawk Mineral Spirits for slower dry and better workability if needed. Allow stain to dry 1 – 2 hours before sealing or topcoating. Clean up with M650-9008 Mohawk Clean Up Solvent, M650-004 Mohawk Naphtha or M650-230 Mohawk Mineral Spirits.
Thats also why I said earlier that a washcoat sealer applied first will not allow a penetraing stain to work properly.