I’ve purchased some Amazing Clear Cast to try out resin for the first time, and not entirely sure if I need a respirator. I’ve looked at the SDS and still not entirely sure. It says to avoid breathing in the vapor, mist, or spray from Part A, but doesn’t directly say I need a respirator. I’ve also heard you don’t need a respirator when handling epoxy resin. Is this true? Also does using a respirator matter if I’m mixing the resin outside?