Knowing which kit would help!

The bigger hollow-bodied kits like the GR1-SF use basswood ply, with a nice figured basswood ply on the top.

This appears to be a semi-hollow guitar, so I'm assuming its the TL1-TB you've mentioned. https://www.pitbullguitars.com/shop/...ic-guitar-kit/

No mention of a veneer in the description, so yes, I'd go with a basswood ply top. It's still veneer thin, so no over-sanding!

The kit photo shows a bound f-hole, and yours looks unbound, which is more Fender-like and less glue to worry about.

Naptha is a fairly mild solvent, good for cleaning sticky stuff off paintwork and plastics, but it doesn't have the power required to remove dried wood glue.

I'd check the pot resistance values, normally A250 or A500/B250 or B500 printed on one side of the connection tabs base. You've got humbuckers, so 500k pots would be the norm, but the may have just supplied a standard Tele control plate with 250k pots, which will make the humbuckers sound a bit less clear than they should.