Re: I Need A Shrink !
Not sure that this can be used as a generalization, but I just got a close look at a couple of boxes that had been insulated with spray foam, don't know what brand. Bad looking job, lots of gaps, lots of variation in the degree to which the foam expanded. It was obvious that getting the foam to cover evenly was beyond the appliers skill level.
Experimenting sounds like a very good idea and be prepared to go another route.
I've used the sheet foam method, worked very well for me, nice looking too. Spa Creek had a publication "The Perfect Box: 39 Ways to Improve Your Boats Ice Box" that detaile how to do it. I still have my copy if needed.
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