Since I had a lot of end pieces to my interlocking EVA foam floor tiles....
Then sanded the filler when it dried.
I let the helmet dry overnight. The next morning I checked the helmet and the Mod Podge did it's job. All the thin foam scales are quite stiff and difficult to move now.
Next I decided to work on the face mask part. To do this I folded a piece of 12x18 paper in half and drew the shape I wanted.
Next I added wood filler to fill in a lot of gaps.
Then I sanded and painted.