Flex Vs. Porter Cable (PC)

Both machines utilize orbital motion patterns and do a great job, but a greater correction is possible with the flex due to more power. In the profession, you differentiate between orbital buffers and rotaries. The later should be avoided by beginners, as it can quickly burn your paint if not used properly. But orbital buffers, such as these two, are very easy and safe to use, and a Flex can achieve up to 95% correction most of the time.