Instant fabric - spray on shirt in a can

A shirt made of this instant fabric fits so snugly it looks as if it has been sprayed on to the body. Actually, that's how the shirt is made.

Photos and a video at the link below show it's done.

A couple of questions come to mind:

1) If the model in the photo, found at the link below, had a lot of hair on his chest, would the shirt be as easy to remove the first time?

2) Would a skin-tight shirt stretch if the owner gained a few pounds?

Link