Touchy subject..Everyone has their favorite method of paint removal..I had a truck cab sand blasted once..never again..While the guy was experienced,he made such a mess,did a bit of damage[warping],but in the three years I owned that truck,I was constantly cleaning sand out of it..Depending on the article,whether it be double skinned or not,I would get it dipped,or garnet blasted,or,as I did to a friends 69 Mustang recently,,got a good quality chemical paint stripper,and stripped the paint back with that..It took me about a week,part time..Washed it off with a wax and grease remover,then sanded the body smooth,and epoxy primed it..