John,
I am just doing this myself.
The screens are a bit of a bear to get out - you have to bend them while
pulling one edge up as far as possible into the groove, until the opposite
edge pops out of its groove. I did this for the first time last month
without breaking anything. The outside, front screen is fixed and the
channel will have been pinched onto it in several places. I still managed
to wiggle mine back far enough to clear the front groove, then I did as
above, bending them to spring them out.
While you have them apart, clean up the frames - but be gentle - they are
anodized aluminium and you do not want to use abrasives or wire wool as you
could go through the anodizing. If you are going all the way they can be
re-anodized to look like new, but it is big bucks.
On mine the two brackets are somewhat rusted and I gently cleaned them up.
No-one seems to know what the finish is on these (that is a sure way to
flush a response from the list). I have ruled out zinc or cadmium plating,
and it is too hard for paint - it is a mystery. If you remove them - check
the concours guide for the correct orientation of the acorn nuts (inside or
outside) as it differs for the two brackets and I would not trust the last
person who messed with them to have got it right.
The seals in the grooves are felt, not rubber. Only the slider has the
felt, the fixed one does not. You can get the felts, and replacement
perspex from the usual suppliers, I know Bob Yule at Autofarm and British
Car Specialists (the Nocks) carry them. Or you can go to your local fabric
store and just buy the appropriate weight of felt and cut it into strips.
The old felt should mostly pull out, but you have to have removed the
perspex first. The channels can then be cleaned out with any handy item,
but try to minimize (avoid!) scratching the alloy. You could also get the
perspex replacements made up at a good plastic shop.
I did not try to clean up my old perspex - you are on your own there.
The new felt strips can be glued back into the channels with contact
cement, but I would only apply it to the bottom of the channel not the
sides, or you will never get them to seat properly. If you go the home-made
route, it may be easier to cut them oversize and trim them later.
I am now at the point of re-fitting the new perspex. I have done a quick
try and it looks like a bear of a job as the new felt is not compressed like
the old crap I took out. I have yet to devote time to this to work out a
good procedure.
Mirek
60 BT7
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