I'm planning something

I'm planning something similar.  It looks like I'd have to sandwich two sheets of Masonite or hardboard back to back to get a 2 sided backdrop.

Backdrop

I will have 1x2's on edge as verticals than then have 1/8 Masonite screwed/glued to either side.  I then use 1x4's as splice plates.  I used to screw the Masonite to the supports/splice plates and countersunk the screws.  Lately I use construction adhesive and screw the hardboard to the supports long enough for the adhesive to set, a week or so, then just remove the screws.  That gives me just a little hole to fill and no chance of "nail pops".  Since the backdrop isn't structural, the glue holds it just fine.

screw pops?

Do screws result in nail pops? Dumb question, but I thought they didn't.

Screw pops sounds like a sugary breakfast cereal, lol.

An idea

When I needed fascia. Remember my layout is 12" deep and 58" high, with a 24" aisle. I don't want anything sticking out. And I also don't want anything that "hurts" when you hit your head. So I chose foam posterboard. Painted it dark green and all I can say is it was the right choice for me. I have bumped my head on it and it don't hurt. In one case, where I lost my balance, I broke the fascia. Easy to replace. FYI, it's all fastened with my trusty DAP Alex caulk. So a putty knife pried it off and that was that. Re-caulked new and you can't see any difference.

Screw pops

The screws don't necessarily pop, but the spackle over the screw can crack if the hardboard flexes due to changes in humidity, vibrations, wood shrinkage, layout flexing if somebody leans on it, etc.

The fiberglass solution, to make the crack in the spackle smaller, make the spackle smaller.

Backdrop

By the way the backdrop isn't up yet, I just put scrap pieces of masonite up against the supports to test the view and get used to the concept of only being able to see half the peninsula.  Actual Masonite backdrop is about a week or two away.

Way To Go!

Dave! (On the progress.)

You're going to have a lot of fun operating your layout. It looks to offer several good switching challenges as well as fun scenes to operate within.

Andre

Looks great

Your fascia looks really good and super functional. Nice job.