Quoting strokin4dr:
That is the crustiest sending unit eva!!! /ubbthreads/images/graemlins/ooo.gif I hope the tank is okay.
I just dropped mine aswell and it looked worse. My tank had an inch of scale and sludge in the bottom. I ended up dropping the tank and powerwashing it out for 2 hours while wrapping on the sides and bottom with a hammer lightly to dis-lodge any loose scale. After I got it to stop puking out scale's, I sprayed the inside down with 2 cans of carb cleaner to remove the varnish. then coated the inside with a can of engine fogger to stop the rusting until I could put a full tank of gas and some STP along with a pint of 2cyle oil. That will help the rest of the varnish.