Doing a great job removing the mastic from our countertops and floors. We have hardwood floors buried under decades old linoleum, foam padding and groovy floral carpeting. The same linoleum was on top of wood on the kitchen counter. We removed most of the junk with a scraping blade and we were pulling our hair out trying too figure out how to get the rest of the crud off of our wood when we came across a video for the Diamabrush products. We have a dust shroud covering up the grinder wheel to vacuum all the dust up and so far it's working great, our floors and counters are looking good as new.