Most of the biker's I know use(d) Kreem. It will, as will all of them, peel if not put on correctly. I used it on my FLP tank and never had a problem. The key is to follow the manufacturer's directions and to make sure the inside of the tank is DRY before putting the sealer in. I've not used POR-15 but I've heard good things about it. I personally prefer Red Kote. Another tip is to buy more than the recommended amount. It spreads quicker, more evenly and with better coverage plus you'll have extra in case you ever need it.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.