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I have successfully used 1/4" phenolic pads at mounting locations but I was

chasing a better finish around the edges.

To do this I laid up a 3 bid (I think) angle that followed the cowl mounting

flange and turned in over the Stainless sheet (this also hides the edges). I

then have nutplates attached to this, larger ones for the forward deck/cowl

attach and small ones in between to actually hold this to the fixed flange.

This angle effectively becomes a multi-nut nut plate in itself. The fibrefax

keeps the S/S tensioned from the back against the flange. Around the nose

gear cutout I have phenolic strips with some 6-32 blind nuts (Du-Bro model

aircraft bits) buried in the back of them before bonding. Make sure it is

drilled behind these nuts to allow for some extra screw length. I then screw

through the stainless nose gear cover plate, firewall stainless and phenolic

edge trim in one go.

I can now remove the Stainless and fibrefax at any time without ruining the

paintwork, no silicone around edges etc and the paint lines are all neat.

Hope this is clear and perhaps useful to someone



Graham Nutt