then you can unbolt all the bits and flip the boat over to make the work a lot easier. rest the tubes on 4 fenders to avoid any problems.
If the paint is bonded on to the hull then you could key it with a flap wheel in your drill (be gentle with it) and slap the Antifoul straight on. you will need a roller and a paint brush to do this , some masjing tape on the tubes wouldn't go amiss. XM, Blakes and International do a range of Antifouls in various colours including a grey that is close to the tube colour.
you can buy the strippy stuff and get back to the original hull but it might not look to clever. without sounding like a bodger I'd be inclined to go for a quick bit of rubbing down and antifouling and get the water in for the rest of the summer, you have ever such a long winter to make the Avon into a nicer boat
then Garryson Flap Wheel 30 x 15mm 80grit
remember play nicely with this as it can cut quite deeply also wear all the safety kit. Goggles, mask, gluvs, portable VHF, bouyancy aid and a TPA