On Tue, 21 Dec 2004 23:04:52 -0500, Roy Smith wrote:

Do I need to worry about electrolysis between the aluminum
and the cast iron?

Aluminium extrusion is often anodised, which is some of the best
electrolytic protection you could get.

As to the rest, then if it's going to get wet, then you should worry
(there are primers to deal with this). For a saw part in a normal
workshop though, it's no problem.

--
Smert' spamionam