I have some 1-1/2" FG foam core cut to shape for a new engine hatch.

What is the best way to cap the edges resulting in a professional looking finished product?

Does ready made FG edge capping exist?
U shaped?
L shaped?

Or seal it with a layer of glass trying to be careful not to mess up the white top surface too badly as that will be on display.
No cushions.

On the green underside I will probably just end up covering it with plastic mirror.

Scrape out some of the foam and fill with thickened resin around the edges. Probably 1/4" to 3/8" should be sufficient.

Sand smooth, then paint or gel, then sand and polish.

You could try capping the edge, I've done it before but not on something with an already finished surface that I was trying to preserve. I think with the foam core you would want something with little more compressive strength (thickened resin) at the edge than just a cap anyhow.

Try 3m 3615 edge tape. It is glass reinforced tape specifically for this application.

I usually do like deezy has said. De-core it about a half inch deep and fill with resin and West's 404. I will also slightly down size the piece and band it with a layer or two of a light cloth. Its kinda tricky getting the final exact size right but just go easy and sneak up on the final dimension.

Whos panel is that and how much weight does it hold?

Thanks guys.

My upholstery guy got the panel for me.

The panelling appears to be very good quality as the FG also goes into the foam for extra strength.
Yes it's strong.
We have been walking all over it, not just tippee toeing around the edges, with no problems - yet!
The hatch is on my 382, so it's fair sized.

I wasn't planning on doing any ribs for extra strength, just edge it and hinge it on.
Maybe a scoop or two later. Haven't decided yet.

I'll try to get the product name, so if your interested you can research further for strength figures etc.
I'll post here what I find out.

I talked to Jeff from Als Custom Interiors who did my boat.
He didn't have the details on the cored FG as he had a local FG shop provide the sheets.

For more information I guess we'll have to take these pictures to our local FG shops for more information.

Sorry I couldn't be more specific.
On one website here in Aussie I did find ......

Core thickness will depend on panel span and loads

As a general rule:
A heavily loaded foam cored fiberglass panel will span 50 times its thickness.
A lightly loaded foam cored fiberglass panel will span 100 times its thickness.
10mm thick will span from .5m to 1m
20mm thick will span from 1m to 2m
30mm thick will span from 1.5m to 3m

This table is a guide only, for the correct use of Windspeed Panels contact Windspeed or consult your designer or engineer for panel specifications.

See http://www.windspeed.com.au/cored_flat.htm

But I am sure all manufacturers have different specifications.