I bought a different truck bed for my 85. It has some type of spray on bed liner that is peeling. I would like to strip the whole inside of the box and start over. I scraped on it for a couple of hours today and did a 12" by 12" area. Would sand blasting strip this off? Without damage to the inner bed floor and walls? Some places it just peeled off by hand, others it was pretty tough. Anyone ever do this?