Just latex. But it’s BM regal, not some home despot crapola. Anyway, just like all paint jobs, the prep is more important. The very most important thing about painting a door is to paint all 6 sides. And the most important part of that with a rail and stile door is to heavily cover the ends of the stiles where the most moisture can enter and exit. I prime the top and bottom twice and I paint them 4 times. If I have to trim the bottom later I will prime it with BIN a few times before rehanging it. BIN dries completely in about 15 minutes anyway.
One thing I forgot to mention last night was that while cutting the latch plate mortise, I ripped off a big chip from the edge. I glued it back on and held it with blue tape then painted the other side first. Then I removed the tape after about an hour and sanded it smooth. Looks like nothing ever happened. LOL… One thing about painting is that it’s very forgiving. I guess the same could be done if I were staining, but I doubt it would be invisible.
Losing fingers since 1969