Factors that you’ll have to take into consideration — and tweak accordingly — when doing this:
Water type: hard or soft water? Figure it out. I found filtered water is best.
Nail polish types: Some brands of polish work better than others. Some won’t work together, some will. Trial and error with your set of polishes helps.
Nail polish colours: Keep color theory in mind and how pigmented your polishes are. Caramel on greige looks pretty smokin’ ’70s, but I don’t like pearlised pastels nor am I a fan of high-contrast colors.