Learning to paint....

Alright, nothing exciting but we're going to try and spray some epoxy primer/sealer (Omni) over the inside of of the car on the new floor and tops of the frame connectors. After which, we'll install the rest of the floor and do it again to cover that as well.

Planning on using the HF purple gun cuz I can toss it if it gunks up. I've already taken it apart and cleaned all the adhesive out of it with lacquer thinner. The tip is 1.4, but it's been suggested to drill it out to 5/64 (1.98mm) for epoxy.

Any suggestions before I pull the trigger, literally?

NOTE: PPE is in place. I'll be wearing a 3M 7502 with 6001 cartridges.

I would look at the manufactures needle size recommendations for that epoxy. Normally epoxy is pretty thin and is shot with something closer to 1.4. Going up to almost 2.0 seems way out of line of any epoxies I've read about so far. But each manufacturer is different. Usually you can find the answers on auto body forums if the manufacturer makes it difficult to find.