[PeterAllen]

I'm on a long slow stagger to the finish line with this project and I'm about to prepare the panels for painting. Considering the amount of work involved I thought I might purchase an air sander but I'm a little confused about what I should buy. What is the difference, if any, between an orbital sander and a palm sander? Should I use a bag to catch the dust or attach it to a Handi-Vac I have for cleaning up the shed? Comments and recommendations appreciated.