So, I got this XT350 tank off ebay:
XT - 3.jpg
The inside is really clean, so I got lucky there (I shook it around with vinegar and BBs just in case, but everything came out clean).
I was able to to get the Jolly Roger and Fox stickers off, but the factory XT decal is under clear coat, so I left it alone.
I scuffed the factory paint with a mouse sander, and sprayed it with automotive gray primer, which covered the XT decal nicely.
XT - 1.jpg
Then, after a few coats of appliance epoxy, I've got a nice looking tank for my TW!
XT - 2.jpg
I also got some '87 TW decals from Torman, which should round out this mod very nicely!