I have approx. 100 configurations of a single part, its a basic cylinder of various sizes.

Is there a way I can added a coating to the part, either at part level or within an assembly that automatically updates to suit each configuration? I've tried with an internal part within an assembly and that does update fine within the context of the assembly but if I open a drawing of a different configuration (to what was last saved) before opening the assembly it shows the correct part but with the coating sized to the active configuration when the assembly was last saved.

Any ideas or work-around appreciated.