I always power sand with the lathe running in reverse at the slowest speed possible, ideally 100 rpm. I use an angled drill that I bought from Klingspor
https://www.woodworkingshop.com/product/tz20000/
I use the scalloped sanding discs from Klingspor. They are much less likely to burn a line in your work.
https://www.woodworkingshop.com/category.aspx?id=21&f1=2"+SCALLOPED I also use the sponge pad
https://www.woodworkingshop.com/product/fr72001/ Between the sponge pad and disks I use the a sponge backing pad from Craft Supplies
Wave 2 Inch Backing Pad | Finishing | Craft Supplies USA I really wish Klingspor would start selling these backing pads with the scallops.
It really helps to hone your turning skills and sharpening skills so that you can get the best finish with your tools. I really try to get to the point that I can start off with 180 grit sandpaper. On a really good day with good wood, I can sometimes start out with 220. It is really time consuming to sand out 100 grit scratches. I progress from 180 to 220, 320, and 400. I then use Yorkshire Grit for my final finish.
https://www.thewalnutlog.com/woodwo...turners-Abrasive/p/67140750/category=19617873 The Yorkshire Grit leaves an incredible finish and you don't have to sand past the 400 grit. I really love how it works.