anyone done high-temp spray paint of downpipes

[keratos]

Sprayed my exhaust pipes on my 500cc scooter this week. Looks well and after curing the paint has gone off well and stuck fast to the pipes. They rust easily and replaced before so  this time after replacing I sprayed them. £17 for a large tin of 150oC high temp exhaust paint from local motor factors

Anyone done this with Fazer? I've heard the pipes rot easily; mine have been replaced by the vendor when I bought the bike 2 weeks ago. I'm thinking of removing and spraying also??

If I remove, do I need to replace any gaskets/seals ?

cheers