In article ,
Steve Walker wrote:
Oh - the chances of a wiper arm being aluminium remote - except for
perhaps some exotics. The base will be pot metal.

The spindle may well be an alloy casting.

Again, normally pot metal, if a casting. But to remove the arm you'd lever
against the nut holding it in place. Protect if needed with some thin
steel, etc.

I have never had any problem with copper-slip and alloys though. Indeed,
I have used it in a number of places where I had difficulty removing an
item, but have had no difficulty there after using it.

Quite. I can only conclude many on here simply Google and never actually
do anything.

--
*The problem with the world is that everyone is a few drinks behind *

Dave Plowman London SW
To e-mail, change noise into sound.