Easy-On Bottom Coating
Bottom paint is not recommended for inflatables. The paint is not as flexible as the material it's painted on, so as the pressure within the inflatable can vary throughout the day (heating from the sun) or week (changing weather), the stress on the paint could cause it to crack or loose its adhesion. In addition, the paint must be completely stipped off in areas where you may need to make a repair to the inflatable.I used Easy-On Bottom Coating (available from West Marine) on the bottom of my inflatable last year, and it was in salt water (Puget Sound) for about 8 months straight next to my boat in the slip. Though it doesn't prevent growth from adhering to the bottom, it was very easy to clean anything off of the bottom at the end of the year, including barnacles. Not much scrubbing required.Easy-On Bottom Coating is recommended also by Inflatable BoatWorks in Seattle as the preferred inflatable bottom coat over paint (due to the ease of making any required or emergency bottom repairs).