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Hi all, just as the title says really, how is the best way to cover foam board sponge? The side that’s exposed as I want to make my own buildings

I know how to hide the core if I join 2 corners but what I planning will mean the sponge will be exposed on external pillars. Would PVA and a strip of paper do the job?

Thanks

Not tried it myself but the big YouTube guys ('sup, Wyloch) seem to use Modge Podge. I'm working with a home made texture paste at the moment, PVA, polyfilla (spackle), sand and craft paint, so far so good

ModgePodge for the win!!!!

I use spackle (which may just be the American word for Modge Podge??) Cheap, dries fast, easily applied, and can be sanded if you want smoothness.
These are foam insulation covered with spackle, then built into terrain boards. Wish I had a work in progress for you.

It really depends on the effect you're after. Gluing a strip of paper, card or plasticard on with PVA will get you a nice, neat finish. For a quicker, more rough and ready option, you can just paint a coat of PVA over the foam and let it dry - that won't cover the texture, but seals it so that you can safely spray it.

There are tools like this one that lets you strip the foam off a strip at the edge of the board. This leaves you with a strip of paper the same width as the board that can be used to conceal corners, or folded over and glued to conceal and end.

Spackle/mod podge, as mentioned, will do it, but can be a little messy to work with unless you're going to coat the entire wall.

Another option is to use plastic detail to cover the exposed areas. You can trim strips of textured plasticard or (shameless plug) use detail pieces like these from the Maelstrom's Edge terrain sprues:

Not only can you use a quick layer of PVA, in the past I have even just used a layer of acrylic paint. PVA or card is your best bet.

If you are trying to google the item mentioned above, it’s called Mod Podge, not Modge Podge. It’s designed for decoupage.