I've been working on this script to automate material tweaking.
It works for both Physical and Legacy materials, i've added the option to add roundedges ,
It's the first version of the script , i plan on adding lights and also a few corona bitmap settings in the near futur , but as the material part is already done and functioning, i think it can already be quite handy for other Corona users.
you can find the script here:
https://www.mediafire.com/file/o34093bn2tprrpu/SimonScripts-Corona_Material_Automator_V1-1.mcr/filehope it will be usefull