Hollywood has come along way from cotton and spirit gum.
To make your eyebrows disappear, as in vampire makeup (you'll want highly arched black brows for that), you can cover your own with spirit gum and then draw on more with waterproof black liner.
Use spirit gum to match your skin tone and fill in the fold.
The fact that you don't have a lot of mobility unless you want to use spirit gum or another kind of glue to hold the swimsuit in place while you walk, sit or move also cuts down on the comfort.
These are available at many costume shops and attach with spirit gum.
