I am working on a respirator in the style of post apocalyptic art as the videogame Fallout. I have an old MK4 navy gas mask ive rebuilt from the ground up so theres no risk of toxins or asbestos from the actual mask, and doing so involved removing the lenses from their crimped housings. This will be the best time to tint the inside of them, however I cant make the film im using work. I apply it per the directions, and squeegee out the application fluid however nothing helps fight the many wrinkles and creases developing near the edges. this is, to my knowledge, due to the curve of the lens being ever-so-slightly compound whereas it looked like a simple curve in site on the mask. ive read hitting the film with a heat gun can help with installing such film on compound curves in car windows however its not working for me and as these lenses are 70+ years old plastic if I warp them with a heat gun then im screwed royally. Im running out of tinting film to attempt with and i really am at a loss for what to do. I need this tint applied as without it it is completely visible inside the mask and ruins the persona of the character. Any suggestions or recommendations at this point would be greatly appreciated as im stymied in terms of proceeding on this build until this is settled.