I have written a script that may be suitable. If you would like to email me I can send it to you so that we can further refine it together.

Out of curiosity could you please include a screen shot showing your results when you used the Poser morph tool to smooth the bottom two buttons?

I appreciate that the Poser morph tool is something of a mystery to many folks, certainly was to me when it first came out. Took me quite a few goes to figure out how to get good results. My first attempts were not pretty :)  However once I did I found that it was an extremely useful and versatile utility just right for attending to minor imperfections in a mesh. Admittedly it is not a panacea for all ills but certainly a number of them.

The script builds a new morph to match the existing but excludes any vertices of the designated material. It then also builds  xTrans, yTrans and zTrans morphs for the designated material only so that those polygons may be manipulated separately.