If you do spray it try to find the position you want it in first. The fit is pretty tight so it would probably scrape off the paint. All three of the companies I posted are Canadian (or have Canadian branches at least) and used to be cheaper than princess. That said though if you don't have a local branch and need to ship it... Princess might be cheaper. Worth a look though
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Chris
http://www.kar.ca/html/en/home.html
http://dev.sowatool.com/
http://www.kbctools.com/can/main.cfm