We need to replace the 25 yo cushions on our boat. The closed cell foam seems to be in good shape, still firm and largely unstained. JSI gave us a quote to do the whole job which was pretty pricy. They strongly recommended that, given the age of the foam, we should replace it as well. Does anyone have any thoughts on the life span of closed cell foam, the feasability of cleaning it, etc. Thanx! Cptn. Happy