I would say spray paint actually, because I have one that is perfect for a Daredevil helmet. I wouldn't recommend plasti-dip because it looks fake and looks like bad plastic. Acrylic doesn't bond well with latex, from what I have heard, so I would recommend spray paint. Also do you have any pepakura files for this helmet I could use please?
I'd recommend against painting this mask with spray paint.
Spray paint isn't flexible, and will crack and chip off the flexible latex.
You will need to paint this with a flexible paint. There are many formulas to make these paints, such as rubber cement mixed with oil paints and thinned with naptha, 40/60 latex and acrylic thinned with distilled water or amonia, or PAX (Prosaide and acrylic 50/50) paint.
You'll have to find what is most available and comfortable for you, but I've been painting with Rubber Cement inks for quite a long time. I like Best Test cement thinned with their thinner Bestine, but naptha works well.
Did you end up using the fabric & vinyl paint on your Daredevil helmet? I bought the same helmet and I want to repaint mine also. I was curious as to how it turned out if you did use the fabric & vinyl paint.