Thanks BBT. It was a big job indeed. I've got some other jobs to post because that's all I've done for the last 4 days. I want to share this one first.
Anyone reading this can comment below. What (if any) danger is there in using strong acids on lead soldered gas tanks? I'll put an answer later if no one gets it.
EK sent a big box of parts and one in particular I knew would be a challenge. It was a rusty Rupp tank that was originally chrome plated. Inside and out looked about the same.
You can mechanically remove plating. Nickel, as I've said before is very tough. There is an expensive stripper which works well and I've used it with success. It requires heat, time, and some agitation.
I blasted inside and out, stripped the nickel, blasted again, and threw it in the tank full of the burnishing pins. Although pitted from rust, it will make a perfect painted tank for EK.
And the inside.