erm i shud imagine the paint wuold crack mate when you sit onit if you spray it dont think theres any special paint either to do it
you can get a flexible vinyl paint from halfords i think thats what is used on seats, tbh mate it ent that much to get it recovered, go choose some material any colour you want and then get it recoverd normally bout 50 quid to do and flexy vinyl paint dont come in many colours, unless you get it made up which is gna be a pain in the arse!!!!
my cousins seat was sprayed when he bought the bike, and it was cracking like fook. and it was also making the actual seat cover crack where the paint had cracked.