And so I'll tell you my plan and hope to hear some feedback.
Right now there is Lexan
installed (can't even see through it anymore). I don't have them out yet, but I know that it is VERY thin material. I know this because it is applied to the surface of my Pilot House with a Stainless Steel
frame around them. The outside SS frame traps the lexan
between it and the fiberglass
structure. I have the interior
out so I know that the lexan doesn't come through the cutout. I didn't think that the lexan was surface applied at first because when you look at them from the outside the SS frame is sitting virtually tight against the fiberglass
. There is no recess in the fiberglass and so that's why I figure it's VERY thin material.
I'm going to replace with Cast Acrylic
. The SS frames encroach on the opening in the fiberglass by approximately 1/2 inch. What I was planing to do is cut 1/2" plywood
the shape of the openings in the fiberglass and push it out from the inside of the Pilothouse up against the exterior SS frame (there are some slight curves, perhaps 1/4" in 16"s). Once this is done, I'm going to buildup the interior
of the of the fiberglass with thickened epoxy
using this plywood
as a screed. I then will make interior frames (not sure with what yet, any suggestions?) that match the exterior SS frames. The cast Acrylic
would be sized 1/8" smaller all the way around the opening in the fiberglass. It would be installed and siliconed around the outside edge. This exterior and interior frames would then be screwed together (not through the Acrylic) clamping the Acrylic to align flush with the 1/2" fiberglass structure until the silicone is cured. After the silicone has cured, the frames (exterior and interior) would come off and then I would install something like "VLB" tape between both the exterior/interior frames and the fiberglass structure and re clamp the Acrylic.
Will this make for an acceptable Blue water installation
Is 3/8" to 1/2" overlap (of the frames) onto the Acrylic be enough?
And another question.
Does any one know if there is one manufacture of Acrylic (Plexiglas, Perspex, Plazcryl, Acrylite, Acrylplast, Altuglas, & Lucite) that is better than the other?
And.... I read somewhere that the army or air force only uses a particular tint of bronze
for seeing through. I can't find where I read this, can anyone help me out on this too?
I only want to do this once (not even once, but I have to) and so any good advice would be appreciated.