If your using true artist oils for a wash, then they should only be applied over a gloss finish, preferably an acrylic. Future works great. Your drying time seems pretty long. Although oils do take longer to dry than acrylics or model enamels, the very thin wash is more thinner than oil so it dries a bit faster. In any case, to remove the excess wash you need to moisten your Q-tip ( I use pieces cut from a worn out T-shirt ) with some turpentine or mineral spirits. Don't over do the thinner medium, you only want it damp not wet, and take it slow, cleaning relatively small areas at a time to avoid excess smudging. A dry Q-tip or rag won't do the trick. If using artists water colors as a wash, the same applies except your Q-tip/rag should be dampened with water.
BTW that D-Day memorial in your sig takes forever to load. A little annoying.
RICK
At My Age, I've Seen It All, Done It All, But I Don't Remember It All...