got some spray on waterproof knocking about and thinking of doing my impacts.should be ok right??

I did mine (impact 2 low) with some brush-on stuff. Seem fine, although not really been tested yet. Can't be any worse right?

APF

bloody good idea! I have the high tops and often get foot burn after long days falling into bogs…..

I don't think it's likely to help that much but it can't hurt, they're not designed with water in mind at all tbh. It might help shed mud as well.

My suede 5-10's make a good alternative to a sponge in the rain, will go for the leather ones next times they must be slightly better.

I did mine. It doesn't make them waterproof but it does make them easier to clean.

Odd shoes to wear cycling ,they should have spd soles!!