Hmm, heat! I'll give that a try and see what happens. Grinding or sanding it off doesn't seem like it would work for all of it because they glued over the screw pivot so it's all down in the crevices and around the screw threads, etc. (ugh) But maybe it'll get gummy with heat and I can pick it all out (or put the owner to work doing it!)
Assuming I
can get the epoxy off and get this part moving again - anybody have recommendations for what type of glue/epoxy to use to hold the broken aluminum parts together? I've never glued aluminum so I'm not sure what's best. I can ask Google but I figure someone here probably has direct experience... Fortunately they did NOT try to make that repair, so I have clean raw metal edges to deal with.
I don't have the machine in my possession or I'd post some pictures. She will probably be bringing it over sometime this week or next, so I have a little time to do research.