Acrylics will naturally build a layer over time that UV can not penetrate, reducing the "tanability" of your tanning bed. Experts recommend you treat your acrylics at least once per year with Novus #2 (Use Novus #3 if your acrylics have deep scratches, followed by Novus #2). Novus #1 is a polish that can be used as often as you like to keep lotion from building up on your acrylics, and keep them as clear as possible.
This is a course cleaner to remove deep scratches. You should use Novus #2 after use, to remove the ultra fine scratches that #3 leaves.