Mudded and sanded, just one wonderful ceiling and in no way scraped a sq. inch off the old ceiling. The heat barrier foil decreased the temperature about ten levels on the surface area of the ceiling (attic higher than). Opt for whichever approach for dust removal suits you best. For http://popcorn-removal-tool67426.qowap.com/25452930/popcorn-ceiling-removal-boynton-beach-fl-things-to-know-before-you-buy