Tank cleaning question

I have came across a fuel tank that was "Kreem" coated in the past. Does anyone know of any sort of stripper or paint remover that will remove or "soften up" this tank coating?

Thanks in advance for your help.

Acetone

I believe I have a gallon left over from a painting project.

Thanks Again.

It may take time to get it all out. Someone posted about this before, search for "acetone" on the forum, along with "kreem"

I think you can strain it and reuse the acetone in the tank to keep removing it until it's all gone.