Bought some super cheap clear coat and added some of my old polish and it worked! I started with a few drops and added about six total to get the amount of color I wanted.
I tried this, and started with 3 (i didn't use the OPI plumping, but a similar sized bottle of clear polish). It wasn't quite as pink tinted as i wanted, so i ended up adding. Start with a few, you can always add more 😊