I don't know of any reason it won't work. Dope will go over most anything. I would do two things. Test it on a spare piece of covering and apply the first couple of coats pretty dry to make sure the dope can't soften the paint. You only need retarder when the humidity is high enough to cause blushing. You'll see a milky fogging in the dope. It's moisture trapped in the dope. Wait if you can for a dryer day amd respray. It usually goes away then. If you do need retarder, use the least amount possible, preferably 10-15% max.