FWIW, There is a spray can foam out there in a blue and white can. I can't think of the name right now, but the foam is white in colour, isn't sticky like the yellowy foam and cleans up with water. Even the nozzle and tube can be cleaned with water allowing future usage. I've used this around the house and it doesn't seem to expand as much as the other stuff, is NO WHERE NEAR as messy, plus once dry the excess can be removed easily. I used a brush at the house. I've not used it in a model application so I don't know about weight differences between the two foams.