Well I screwed up. I did exactly what I was being so careful not to do.
I knocked the glue bottle and some MEK escaped.
I ended up melting about a third of one of the RPO sides. The glue hit the back side and I thought I could save it but......... I finally admitted to myself it was gone. I had put this much work into it I had to make it right.
So I cut it off, just to the right side of the baggage door and spent the evening remaking the mail room end of the side. I'm going to leave it for a day or so now and go watch hockey highlights instead..