1973 Kawasaki S1 Update 4

With the tank stripped, it needed to have the inside cleaned out before it was sealed. There are several types of acid that will clean out the inside of a rusty tank but the easiest and safest is white vinegar- acetic acid. It is mild and you need to let it sit for a few days as it dissolves the rust and gunk but it is environmentally safe and easily disposable down the drain. Just fill the tank with a few gallons from the grocery store and let it sit. Drain most of it out and drop a few nuts and bolts in there to shake around and loosen any rust flakes and then drain and rinse with water several times. Dry it out with a heat gun or hair dryer. It needs to be totally dry before sealing.

Now it is ready for the sealer. There are kits you can buy but I use vinyl ester resin. You can get it online from places like fiberglast.com. Pour it in and keep turning and rolling the tank until it starts to set and drain out any excess. About 4 ounces will coat an average tank.

Next, we re-blast the tank to get any rust off the outside and it is ready for epoxy primer.

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