Can I use this scrub before self-tanner or body cream?

Yes — this is one of the sensible ways to use it. Smoother skin helps body cream, self-tanner and other leave-on products spread more evenly, because dead surface cells and rough patches are what typically cause patchy absorption and streaks. Exfoliating first is a standard preparation step before self-tanning in particular, since self-tanner clings more heavily to dry, flaky areas like knees, elbows and ankles.

A few timing details worth knowing:

• Before self-tanner: exfoliate and rinse very thoroughly. This formula contains coconut oil, and any oily residue left on the skin can interfere with how self-tanner develops, so make sure the skin is completely clean and fully dry before application. Many people prefer to scrub several hours or the evening before self-tanning rather than immediately before.
• Before body cream or lotion: no waiting needed — applying moisturizer straight after showering, while skin is still slightly damp, works well and extends the soft feel the scrub leaves behind.
• After self-tanning: hold off on scrubbing, as mechanical exfoliation will speed up the fading of the tan; save it for when you want to remove the color evenly.