It will stick to anything , its sands like butter , it can be used to mold small parts like bumps and blister ect , it drys pink /white , you mix a small amount , drying time to sand aprox 10 mins .

It wont crack even under vibration , In Pa you can only buy it at auto body suppliy houses but other states have it in auto stores .

Remember they make a ton of this stuff , the one for planes is Easy Sand
The guys who fly turbines in my area swear by it and said using anything else is like useing lead