That's similar to what I used, but I bought the Behr product (only because their color seemed to match my stand better). If I could, I would add another coat of polyurethane on top, because the more moisture protection the better. I didn't add the second step because I was just doing a canopy to match my stand.
Some people also do the inside of stands with Kilz. I think a white interior looks clean and the extra light reflection inside makes it easier to work on your system. Unless there is some unusual reason you want the inside to match the outside, I'd personally go Kilz with white enamel over it.