1.   Apply a prime coat of latex enamel undercoater, finish with two coats of a semigloss latex enamel.

2.   A good latex primer and latex semigloss enamel will stand up, particularly if the window is allowed to dry out between showers.

3.   A. Use a latex enamel undercoater, then one or two coats of an indoor-outdoor oil-based enamel, or a latex semigloss enamel.

4.   Finish with two coats of latex semigloss enamel or eggshell finish latex paint.

5.   If you want to paint the rack, apply a latex enamel undercoater, followed by an eggshell-finish latex wall paint or semigloss latex enamel.

6.   Use a latex enamel undercoater, then finish with two coats of a latex semigloss enamel.

7.   Use an oil-based indoor-outdoor semigloss enamel and see what happens.

8.   You could use a semigloss latex enamel, but I think the brick will look better with a flat surface.