How to apply particles on Weapon/Hat/etc... when equiped (PointShop Item)

If the title didn’t make sense this is what I am looking to accomplish…

When I use buys a specific item say a hat, if it is some sort of special hat it will also apply a particle effect on that item as well.

I’ve thought making swords with a fire effect that maybe also increased the users running speed, or allowed double jump. Stuff like that!

Here is everything to know about particles: http://www.facepunch.com/threads/883304-Particles-Thread-All-you-need-to-know?highlight=particle

But particles can’t supposedly be put into addons as they do not load until a client restarts their gmod after downloading the particle. idk If this has changed since this thread^ is 4 years old.