We removed silicone caulk from the PO that was smeard about an inch up on the shell above all the windows and doors on the curb side of our 84 Sovereign
. it was over 3/8 thick in spots. LOTs of work, but silicone remover made things easier. Couldn't imagine doing it without for this job. Vintage sells it, among others, but it sure helps clean the aluminum bare. Takes a couple applications for extra thick, and overnight also helps instead of the 2 hours the tube recommends. thanks to these forums for making recommendations. GREAT idea on the awning by the way!