I say go for it. if it doesn't turn out how you like pull it off and do it again. sooner or later you will get good at it and can charge the fraidy-cats to do theirs. also a buddy of mine worked at a tint shop and he said they use johnsons baby shampoo to soap their water. Never tried it myself so take it as a grain of salt...probably worth a try though, although he was a remote start installer at the shop he did tint his windows several times...(lots of tint tickets...lol)