As Stik says ... rain and wooden props don't mix. I flew down to Compton a couple of years ago in the Veep. There was a massive rain cloud over the airfield so I stooged around for a while. Eventually due to low fuel, I had no choice but to head in. It was surprisingly dry crouched as low down and close to the winscreen as possible (the veep is open cockpit), but when I landed I could have cried seeing the state of the prop. It had to be rebuilt as the leading edge of the blades were completely buggered!
SS