Vintage 1950's 3M Sanding Block

In this video we check out a 3M rubber sanding block from the '50's.
This tool would have been used for auto body work and/or woodworking.
I'll compare it to the modern equivilant, and attempt to dual wield two sanding blocks at the same time.

3M Logo History:
https://1000logos.net/3m-logo/

00:00 "Rare Archival Footage"
00:29 Overview
01:11 Loading
01:45 Dual Wield Attempt