I used aircraft stripper to strip down the 30+ year old paint on my Duster. It is relatively easy to use, just apply let sit for 10 - 15 mins and use a plastic scraper to scrape off the paint. Make sure you use a good pair of rubber gloves and eye protection. As for how much it took to completely strip my car, I do not quite remember but I believe that two large cans (I think 5 gals) were used in the stripping of my car. Stuff works great but do not let it dry up on surface of paint. Not sure of if it works well on a hot surface. I used it when the temperatures were in the 50's - 60's range. After I stripped the old paint off I washed the car and then used a small orbital sander and hand sanding to sand down all panels to prep for body work and primer. Here are a couple recent pics of my car with 6 year old paint. it has held up very well, but I do polish and wax this car frequently as well as I do not use an electric buffer on the paint.