I've been using tmy recently purchased Fein Multi-master extensively on my recent stripper project. Not only did it save me hours of my time, it also saved me aching hands, wrists, elbows and neck from manually scraping or holding an ROS. Using the different attachments I was able to:
Sand the inside of the hull - cut out the hatches with precision - cut out the cockpit opening - cut the extra carbon/glass/lip extending below deck from the coaming install (in 15 minutes) - cut the slots for cheater strips - AND, AND, this was fun... I stripped the deck with parallel cedar strips, so there was glassed cedar over-hang along the entire port and starboard sheer (hard angle sheer like a Shooting Star). With one of the Fein blades, I was able rest the circular blade AGAINST the side of the hull and simply draw the blade through the deck over-hang...took about ten minutes.
Pricey tool that I now wonder why I waited so long to buy.