We spray our camping gear with a waterproofer, and I was thinking of spraying just the sun canopy on my BOB with it to help keep LO dry in a light sprinkle. If I do the treatment and make sure it is very dry and aired out, do you think it would be ok? I'm not sure I've heard of a lot of people doing this. I know it won't work in a torrential downpour, but the BOB canopy is big enough that it should work in a sprinkle. What do you think?