Evaluation of the thickness of the product to be remove (acrylic not included) filing to remove shine of the gel polish , application of soak cotton with pure acetone over each nail and wrap with profesional aluminum fold sheet approx 5 min , scrape the product remain with a professional tool, check result and repeat last step if necessary . After the nail is clean, gently buff with a sponge to even the nail and proceed to apply the first coat of new polish .