Maybe by now you've found your answer to remove the yukky stuff, but if not...you might want to consider sponge painting. I fell in love with this technique several years ago, as we now live in a house that has all sorts of "not smooth" surfaces that ought to be smooth! If you prime, then paint your base color, then sponge on several (I like the effect given by 2-3 sponged on colors or shades of the same color) coats of paint, the unevenness of the yukky stuff most likely won't be noticeable! So, in other words, if you can't beat it, work with it! Good Luck!