JBL, I had the same problem, a nasty gas tank. I ordered a kit from Eastwood for around $45.00. You clean the tank with muratic acid, which is available at most hardware stores. Next you use the metal wash supplied with the kit and let the tank dry. Last the tank sealer is poured in the tank to coat the complete inside. Two days later its cured. Takes a little time, but sure is less money.
Its going on 4 years now and I never had any problem with rust or the filter clogging.
I dont have a clue what the plate is for in the tank, but if it ddoesn't cause any problem I guess you could leave it there. Otherwise you will have to open the tank to remove it.
Good luck, Jim
