Embossed and ACL? That should also be taken into consideration.Personally I've never seen a finer gauge steels pad to do any damage to glass worth noting but either will destroy paint.
Straw Lines - is a new term to me. I can see them alright, but the term is not in my list and I would like to know what caused them. The posting didn't give enough information about how the jar was made. If it was hand blown, I can imagine one cause. If it was ABM made it would be more of a mystery. We will be on the road soon, so it may not be resolved for a while. RED Matthews
Here's a pic before & after of a Billy Coke bottle I tumbled a few years ago. It got rid of more then just scratches. It was pretty rough & beat up when I got it. LEON.