I looking for a way to get rust prevention (Vactan specifically) into inaccessible corners of our little steel boat. The particularly difficult area I want to paint is the inside of the bathing platform which is a box section at the back of the boat with only a square hatch in the middle for access. Since it's around 3 metres across the sides are over a metre from the hatch.
I have a basic Wagner airless spray and it has a 'long' spray head but it's not really long enough.
I'm wondering if some sort of manual trigger operated spray gun might do the job. Vactan is water based so washing out is relatively easy, could I get away with using a plant sprayer of some sort?
Any ideas anyone?