Ok
I got a few problems

.
I got my framework done for my dummy-tank diorama (2 of them) and now I want to put welding seams on the intersections, that is why I made the previos post, but ... I don't seem to get it right
I tried the millyput way (won't stick), the spreu (and glue) way (does not form nicley around the rod) but is does not work.
I think that the problem is that there is no real flat surface, I mean the whole frame is made of 3mm rod. I now have a lot of intersections where I need to put some weld lines on.
I have made a crude 3D skets of the framework before I started and since my digital camera is broken

I can't give you a picture of the builded frameworks, but I hope you see what I mean.
Any suggestions are more than welcome