best product to paint hot tub with??

[truespartan]

Can you please recommend paint/gelcoat that will work best for the fiber glass hottub that has previously been painted with gel coat.. This is commercial hot tub that stays filled all the time. We add chlorine and bromine frequently in the water. I need to find a paint that will not chip and come off like it did with the gelcoat that i bought from uglassit.com last year.

Thank you in advance
J