Not sure what scrim is? If it is a sealant then yes petroleum and caustic detergent materials can wick into the bonding material and cause the fracture or deterioration of the bond. We washed our Sikorsky blades with castile soap and DI water or bottled water, which had minimal mineral content. We used to wax our helicopters because we spent a lot of time aboard ship. I tried the wax on the blades and the mineral spirits in the wax caused a debond on the blade pockets. That stopped very soon thereafter.
I can't say this LOUD enough. Don't use WD-40 for anything on an aircraft unless the manufacturer of the aircraft for that particular function approves it. I believe Allison approves it for long term storage of an engine on aircraft and the WD-40 is not used as a preservative. WD in WD-40 stands for Water Dispersant. Also the fumes from WD-40 can cause some serious medical problems if it is ingested into the lungs or into the stomach for whatever reason. Read the label. I assume that other similar products can cause the same problems.
