What kind of da are you using? Some are finish sanders and run much slower than a regular da. Also what kind of compressor are you using? Body tools use a lot of air and if your compressor can't keep up it will keep the da at a slow speed. Also look just above the pad on the da. There is a lock you can slide into the shaft of the da locking it into a grind mode. You can also upgrade to an 8 inch sander commonly called a mud hog. This will increase your ability to stripe. You can also go up to a 36 grit for stripping but be sure to finish with 80 sometimes 36 grit is a bit hard to get the scratches out of metal. Another option would be to chemically stripe the area. Can be messy but will take care of a larger area in less time.
