I'd like to show weld on a surface to represent cladding.

There is a .jpg that we use in a library feature, and it works.  But, as soon as the surface appearance is opened for review/editing, it is removed and cannot be replaced.

I think we need a .p2m file, which I know nothing about!

Is the a weld texture .p2m anywhere?  I'm sure someone has done this before.  Thanks!