So I'm guessing Rustolium is acrylic enamel and ok to spray over epoxy, superpoxy, Klass Coat or Zpoxy?
It won't curdle it up. "Compatible" means it won't melt it or craze it, or wrinkle it up. That doesn't mean it will stick very well. Many of the combinations in this list are notable for poor adhesion and/or other problems. Test carefully any planned mixing of materials.
Some examples (that I happen to know about, but being very far from an expert on):
SIG Dope will sometimes just lie like a film on some batches of Brodak dope, like you had painted it on glass, and it peels up cleanly. Other batches of Brodak dope are OK. I have no way to identify which are which
Butyrate Dope doesn't stick very well to epxy, particularly after the first week of curing.
Silver butyrate dope tends to act like teflon, and nothing seems to stick to it very well.
Epoxy over butyrate dope tends to trap the (eternal) outgassing and bubble up
Butyrate dope will not stick to "lightweight" spackle (Model Magic, etc) and will soften it up, maybe permanently
Plasticizer in dope greatly reduces the adhesion of anything over it
Epoxy doesn't stick very well to butyrate dope (any kind)
Different batches of Aerogloss are incompatible with each other, and will immediately "craze" the underlying paint, like a million little cracks
Butyrate dope has minimal adhesion to Epoxolite. It sticks better to Aeropoxy and really good to SuperFil
Anything in a spray can is a crapshoot, and two identical cans/part numbers might have different ingredients
These are just the ones I can think of off the top of my head, and came from experience, witness the results, or first-hand from reliable sources.
Brett