Rusty gas tank

I have a couple of gas tanks that need to be reconditioned. I am debating between a radiator shop that is about an hour and a half from here or the Eastwood Gas Tank Sealer Kit.

I am interested in the Eastwood Gas Tank Sealer Kit as I don't want to deal with a 3 hour round trip to drop off and a 3 hour round trip for pick up.

Has anyone used the Eastwood kit? How easy was it to use? Did the sealant last or did it begin to peel off and clog the fuel system?

When using it, how did you seal all of the holes (fuel sender hole, etc) during the process?
Author: ehostler