Once the seal
: coat is cured there is no chance of outgassing.

Once the seal coat is cured, you also have the chance for blush. This has always been my concern. Many of the epoxy manufacturers give you a window of time that you should re-epoxy to get a chemical bond. After that you can get blush and then you are forced to wash it and sand. And now you are getting a mechanical bond. Mixing and applying epoxy is the necessary evil on a fun woodworking project for me and any step I can take to do less of it, I'm happy about. From what I read, I know I'm in the minority. I think of it this way, 4 seal coats for inside and outside of the deck and hull is a lot of epoxy work and clean up to achieve what I'm doing without that.

The supposed blush-free epoxies (which I use) can blush because I have seen it. If your epoxy has hardened and you can drag your finger over it and create a trail in the shine, that's blush.