Update on my post re the scorch......it is gone! I made a paste of hot water and oxyclean, laid it on with a spoon, and walked away for abt an hour. I peeled the dried paste off, rinsed and am ready to continue putting my blocks together. This is a QAYG and I will do a 'show and tell' when finished...pointing out the subject block. Thank you to all who offered suggestions. I'm back with my experience in case anyone has this happen to them. I'm going to write down and keep for future, all the different suggestions that were offered.