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Fiberglass and Materials Corner / Re: Cabin Ceiling
« Last post by RickK on May 01, 2024, 05:14:15 PM »Do you have access to a fiberglass store? You might look for a small piece of Plascore or other honeycomb composite. They're very easy to work with and when it's glassed on both sides, it's stiff.
On the bare hatch glass I would grind it down and if the sliding hatch is already stiff (can't twist it), then add some 3 oz CSM (chopped fiberglass) and roll on the resin (I assume poly). If it's not already stiff then I would add a layer of 1708 CSM side out on top of the CSM added as the first layer. That will stiffen it up. Then cut your composite (you could use plywood, 1/2 or even 3/8" with glass on both sides is beefy enough. Trowel on thickened resin on the hatch, as Fishhead mentioned, lay in the core and you can wedge a 2x4 up against it to press it into the resin. If you're going to top coat it with a layer of glass then you might want to bevel the edge of whatever core you decide to use - 1708 doesn't like to traverse corners.
On the bare hatch glass I would grind it down and if the sliding hatch is already stiff (can't twist it), then add some 3 oz CSM (chopped fiberglass) and roll on the resin (I assume poly). If it's not already stiff then I would add a layer of 1708 CSM side out on top of the CSM added as the first layer. That will stiffen it up. Then cut your composite (you could use plywood, 1/2 or even 3/8" with glass on both sides is beefy enough. Trowel on thickened resin on the hatch, as Fishhead mentioned, lay in the core and you can wedge a 2x4 up against it to press it into the resin. If you're going to top coat it with a layer of glass then you might want to bevel the edge of whatever core you decide to use - 1708 doesn't like to traverse corners.