Another gas tank question

[RidetoXS]

What's the best way to seal up the holes in the tank (fuel sender, petcocks) when prepping it for cleaning?

[greatnw]

I used an old inner tube to make rubber gaskets (very crude) and electrical plates with holes drilled in the appropriate places. Worked great. When I coated the tank I just used duct tape.
Good luck to you. Be gentle with the process.

[latexeses]

When I covered the holes I used some 1/4" plexiglass scrap and pieces of an old truck tube for a gaskets.

[skids]

Turn the sending unit so that the float is on the outside and use innertube as a gasket. You can use a piece of flatstock and drill holes for the bolts for each of the petcock holes.

What's the best way to seal up the holes in the tank (fuel sender, petcocks) when prepping it for cleaning?