What paint are you using? Seeing how you primed it twice I'd probably skip the sealer. Been doing that a lot lately depending on how transparent the color is. Wait a couple months and that paint will be $1500.
Gonna have to seal it BP calls for dark grey sealer and transparent color so less paint covers in 2 coats but 3 is best.
Everything is going up in price just herd today glass prices are going up 9% soon.
