How do I give a skin a different material?

I have a prop that currently acts like metal. How do I change this so that it acts like ice.

And don’t say the Physical Properties tool, this isn’t for Gmod at all.

And I know I can do this without decompiling the model, so if you’re going to say to decompile the model, don’t even post.

even though you didn’t want me to post, but still:
Models surface is set in models .QC file. And there is no other way to change models material.
SO you have to decompile it.:nws:

There’s a line you can put in the .VMT. I forget what it is. I’m honestly just winging it, I don’t know the actual command.

$surfaceprop “ice”

Try that.