glitteraty,
This may work with clothing (clueless because I only have PP2014), but when it comes to complex objects it's different (In my example, I chose the wristwatch for a reason because it incorporates rigid and deformable parts at the same time).

I don't think that it will work well with rigid objects, and I also suppose (note well!) that the decimation tool doesn't provide options for rigid objects.
So it's back to good old handicraft...

Peter