quote Lyks2Tinkr:
Solder the tank together. Slosh with MEK or Acetone to make sure it’s clean and then line the tank.
If you prime 1st then clean you stand a good chance of acetone getting on the primer and messing it up. I have experience in the above 🙂
I have some acetone, but I believe the phosphoric acid leaves a coating that promotes
adhesion for paint. Not sure about the "Red Coat Sealer" and phosphoric acid coating
compatibility yet. Perhaps I should just take a rag with a little acetone and wipe
down the inside lightly before I solder the lid on. If I "slosh" it with acetone after
the lid is soldered on, with all the pin holes, I’ll have acetone washing off my
phosphoric coating on the outside, lol. Who said life was easy!
Thanks for all the tips.