Making EVA foam grip sticky

I managed to get some EVA very cheap, designed for SUP boards. It feels great on the chest and I was able to use contact cement with success in gluing it down.

But it’s very slippery on a wetsuit when wet, even with wax.
Is there anything I can do to make it grip better?

Related thread:
http://www.swaylocks.com/groups/traction-pad-making-your-own
Related idea:
Improving foamie grip

For anyone reading and interested I think if I was buying I would prefer cork as it’s more sustainable but I need to use this stuff up.

Appreciate any advice.

Deck repair?

Sand it a little? Sand your wetsuit a little?