Filling dings and gaps in foam?

[steepski]

I picked up some cheap xps foam from a local construction site. It's in great condition for the most part, but has a few small gouges and dents. Any ideas on what would be the best to fill them in with? Standard spackle or joint compound?

Thanks!

[John61CT]

Great Stuff applied sparingly, level off with a wide putty knife, then when set a Surform plane

[GPW]

You could try spritzing it with some water, covering that with a cloth towel and Ironing it on a mid heat setting … The steam re-expands the foam …

Some people pour boiling water over it , from the kettle … Try that first ..