NO LUMPS with this technique! How to make perfect DIY chalk paint with lime (AKA calcium carbonate). Tips for mixing a lump free paint, what it looks like and how long can you store it? This chalk paint hack saves a lot of money! No lumps like plaster of paris DIY chalk paint recipe! Lime and Calcium Carbonate make great DIY chalk paint! #diychalkpaint #chalkpaintrecipe #chalkpaint #limechalkpaint #calciumcarbonatechalkpaint