That's the great thing about Future you don't have to thin it with anything. You can airbrush it straight from the bottle or if you are going to apply it by paint brush it self levels, and leaves virtually no brush marks. Its also acrylic so it won't do much damage. Best of all its real cheap, I can get a bottle of it at the grocery store (kitchen cleaning supplies aisle) for $3 or $4 and it will last me a year.
I'm not sure that this will solve your problem, did you seal it with Semi-Gloss after you applied the oil wash?