What brand epoxy did you use?
I use SPI, which if left to induce overnight instead of the normal 30 minutes, tends to thicken up a bit and give it better build properties. If I were doing this (since the 7 day window is expired) I’d use the opportunity to block out the panels and find highs/lows, metal bump a bit to address, then follow up with another dose of epoxy followed by your high build if desired.