Does anyone have any experience with DIY spray foam? I'm not talking about the little cans you use to fill cracks and small gaps. I want to re-insulate my garage and am thinking it might be quicker if I can find a place where I can get a kit to spray the wall cavities. I'm not sure where to find them in town. There are a lot of spray companies, but I think my garage is too small of a job to make it worthwhile for them to come out.