I had attempted touch up paint pens previously. I live in Louisiana, where the roads are notoriously bad. I had over 80 small rock chips on the hood of my 2015 Mazda 3. I bought the Dr Colorchip package last week and spent four hours, cleaning, applying paint and wiping with their sealer solution. All I can say is WOW! It saved me $900... vs. having my hood repainted. Only from inches away can you see the corrections. I still have half of the small paint bottle left and I am going to order another bottle of the Sealact to finish the other small spots I have left to cover. I am 100% pleased with the results!