can you clean a fuel tank?

Wow, thanks for all the responses, I like the price of the E-bay one you tagged "67 cuda" but it says dose not ship to Canada", too bad, believe it or not I checked with the three jobbers I normally do business with at my shop that I get good wholesale prices with but the 275 was the lowest?, my son replaced the tank in is 73 last year and only paid about 150 and that was a Spectra maybe Spectra dosn't make a tank for a 73 and this was a different supplier?, I will check, I have used muratic acid before and it is pretty costic, I guess I could try the chain/acid trick, the key would be the liner, anyone here try the Speedway liner that was posted here before?