What's the cheapest/simplest way to be able to spray paint? It's just to get paint into odd inaccessible corners on our boat, down in the bilges and the inside of the (box section) bathing platform. So it doesn't need to spray particularly evenly or anything like that, it just needs to spray and to be small and light so I can poke it into difficult corners.
I'd prefer it not to require power but it can be mains powered if that's the cheapest/easiest way. The sort of stuff I will be spraying is probably "Vernis pour Rouille - Rust'Killer" (which is very thin and penetrating) followed by normal oil based paint.
The ability to put a long[ish] handle on the spray head would be very useful too.