Hey Everyone
I couldn't find anything on here about fuel tank restoration, so now I have done it myself, I thought I'd give people a heads up. I had rust in my tank which was a little bad, but then got really bad after I left it on the garage floor for a few weeks.
Basically what I did was clean it out with hydrochloric acid and water. This ate the rust AWESOME! Then I used the POR15 product ($108) and followed their directions, it came out all good! Awesome stuff.
I am not gonna write up a thing on how to do it as others have on the net, but here are some links.
Make sure you get a mask and face protection for the acid. Cost me around $50 for the mask/canisters, $3 gloves, already had a face sheild. Don't risk it.
Here is one of the guides I found was pretty detailed.
http://www.ratwell.com/technical/FuelTankRestoration.html
POR 15 Shops In Australia.
http://www.ppc.au.com/restoration.htm
http://www.por-15.com.au/
Cheers
Chris