If you can't "find out"...
...then test for compatability...Prep/paint over a small area and wait to see what happens...Make a deal with the seller that you'll buy the paint from him (quanity needed of one that will work,) provided he helps you figure out which that is by letting you test.. Yeah,sounds like a hassle, but not nearly as big a hassle as removing all the old paint because of massive "wrinkling and Bubbling" of non-compatable paints...plus,once you've done it,you'll never have to again...you will know what you put on and you'll never forget..even if you try!