Hi, Rebecca. This is a great question. Hiding without makeup means that you need to treat these spots.
Treatment depends on the type and color of the spots. If these are brown spots, you will want to try a whitening cream. Check the "tips" section of your plan for specific suggestions. Don't forget that in order to fade brown spots you need to reduce sun exposure and use an oil free sunscreen every morning.
Regarding pink-red spots the answer is different. These will usually fade by themselves a few weeks after active acne is stopped. If you want to fade them faster you will need to go for laser treatments or use green tinted makeup.