I have access to a RV 6, It’s been sitting for some time, covered in dust. My question is not about the engine. I have read someplace the 6 tip ups leak badly directly down on the avionics. In looking at it, don’t see a reason to doubt it. How would you clean the canopy and around the tip up with out scratching the canopy. I want to remove the dust layer from the canopy. If it didn’t leak I would use a hose and soft water pressure and just rinse the layers of dust off. Thank you. Ward Combs.