First off, all epoxies blush, even the ones that say they don't. Simply put, if it's a BPA molecule (Bisphenol A), like most marine epoxies are, it's going to blush, unless you have perfict environmental condisions in the shop, which most builders don't have. I have an A/C'd shop now and I can get non-blushing epoxies to cure without a blush, but I still don't trust that some surface contamination hasn't occurred, so I still wash freshly epoxied surfaces, just in case. This is a result of having blush ruin and force a redo on several projects.
Some, not all, nor even most alkyd paints, will have a problem with fresh epoxy coatings. Most of us have a mental note about which brands and formulations have this issue, so don't use these products over fresh goo (like Rustolum marine topcoat for example). It doesn't mater if the surface was washed or not, it's a chemical reaction that occurs as the epoxy finishes it final curing process, which can take a few weeks in some cases. Most are painting before the goo is actually fully cured, so this problem comes up. This said, I've never heard of a fully cured epoxy having this issue, but I'll bet it still can occur on fully cured epoxy.
I'm glad to see some of the paint manufactures are recognizing this and making cautions about it. PrimeCoat works well and being an epoxy doesn't have this issue, so if using single part Interlux paint, use the PrimeCoat or possibly an other epoxy primer.
With paints getting as sophisticated as they are now, lots of things can screw with the cure. I had an issue with a "non-clogging" sand paper once. I primed, then sanded normally, but the top coat didn't stick. I did dry normally, but peeled off in huge sheets of cured paint film. After some investigation, I found the sand paper's non-clogging feature was done with animal fats, which left a residue on the surface the paint didn't bond too. Pissed me off, as I used $300 a gallon paint and had to strip every thing and do it again, for a customer that wasn't in the mood to wait.
It's things like this, that force painters to stick with stuff they know, rarely varying from established products and procedures.