On Sun, 30 Apr 2017 12:53:43 -0700, Charlie M. (UH & 002 owner/pilot)
wrote:

Sounds great, good job. As to the rotary brush, I have heard that it
should be brass to prevent steel doing a galvanic number on the aluminum
(dissimilar metal corrosion) if you leave any ferrous metal behind.
Thus my comment about using Scotchbrite.

Good point. However, as pop rivets were used to join the panels on my
trailer, and they almost always have steel cores, THAT damage was
probably done decades ago....


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |