Hot glue and expanding foam?

[Nbian Jwaca]

Hopefully I do this correctly, I've never done much on here, but I need some help in regard to expanding foam and glue. I'm talking about the sort that DVC uses in their foam head blanks. Hot glue has not been working at all, and usually peels right off. Are there any alternatives or tricks to getting things to stick? I'll include a picture below

Comments

[runnerrabbit]

You gotta score the surface to give the glue something to grab on to! Going over the surface with a box cutter and scratching it up works and if you have a slicker brush, brushing the surface and minutely shredding the top layer of foam works too!

[ext_3646010]

I'll give that a shot! Thank you!