start of body work

A mudhog is a planetary geared down rotary sander. Not orbital.

Just grab a DA from a cheap tool supplier. I use them all the time and turn out show winning paint jobs. There is nothing wrong with them for complete paint jobs.

If I were a painter or prepper in a collision shop, I'd buy a nice, single hand palm DA sander made by Dynabrade, but I don't spend enough time in my shop to justify spending $300 on a sander.

The same goes for the Hutchins Mudhog.

Again, air files are commonly referred to as mudhogs.

If a car that I'm working on has a significant amount of body filler in it, I use a torch and paint scraper to burn the resin from the filler and let the filler crumble away from the body with the putty knife. Way cleaner, easier and quicker than sanding old filler off.