Your best bet for paintball use would be to get a mask from jt , remove the visor, straps. then mask the outline of the shape you want. use a dremel or carpenter knife to remove umwanted portion of mask. Then cover the mask in masking tape to give you the eyes you want. once your rough design is in place build up the shape of the eyes. clay c board sintra foam. Anything wil work. After the construction of the eyes are in place Fiberglass the mask 1 good time and let it dry! WELL VENTELATED AREA
Wear gloves and long sleeves. Once FG drys sand and repeat until your design is perfect. Good luck PM any questions.