I use lots of dark polishes and even with my base coat, my nails never seem to get as white as they are when I don't wear polish. I've been looking online and have found a lot of DIY versions. I wanted one that was simple and I had the materials on hand.
I settled on a vinegar soak. For each cup of warm water, add up to 1 TBS of white vinegar and soak for 8 minutes. Vinegar can be drying, so be sure to use a lotion after you've finished your manicure/pedicure.
I definitely can tell a big difference. So cheap and highly recommended. Sorry, no before and after pictures, but give it a try!
As I try new versions in the coming weeks, I'll be sure to post the results here!