TDM Car Custom Skins

I’ve created my own custom skins for the Ford CrownVIc and Ford Taurus emergency vehicles, and they work and such as I added them into my single player throguh my addons. I used the same method to apply the skin into my Garry’s Mod DarkRP Server and they don’t seem to work. I can seem my own skins and such, but others will either see a workshop skin that is on that skin slot, or it will just be blank. How can I add Skins onto my server so others may see the skins as well?