I've restored a few old dirt bikes for extra $$$. Since these are not new bikes, I can't buy graphics for them. I've been cutting my own with pretty good success, but after the first tank of gas, inevitably, fuel vapors leach though the tank and "bubble up" the graphics material. I thought of trying a tank liner or liquid sealer that is normally used for metal tanks. Anybody have any experience with this? If not, how about some opinions. Thanks in advance.