Posted by Vaughn on Friday, July 09, 2004 at 9:01PM :
In Reply to: Gas Tank Renewal posted by Hal on Friday, July 09, 2004 at 2:46PM :
When you hot tank a gas tank the chemical will eat some of the OEM coating off which is ok as long as you recoat the tank to prevent it from rusting. Remove your tank and look inside with a flashlight. If the sides look nice and shinny, then you probably had junk inside. If they look brown and rusty, time to clean and recoat. You can have it cleaned (hot tanked) by a radiator shop and that will etch the tank which is what you need to do before you recoat. There are several products available to use but you have to be careful in your selection. Some of these products will separate from the tank side over time. I used a product that is approved for both vehicles and aircraft. I figured if the FAA has approved it, it has to be good.
The product is only available from Bill Hirsh. His information is in the PIF under gas tank. I did my tank and filler tube. So far no rust has appeared and it been 7 years.