Is it possible to combine two textures? So I made these fenders for a truck and added a picture as material, the flames and red color are both from the same picture but I think it looks kinda boring (It's a big png with an entire colorscheme for other parts as well).

I was thinking about making/downloading an aluminium material and combine the picture and aluminium to give it that shiny look like a real truck. Not sure how I need to do this so any help would be awesome!
edit: here's the link to the image: https://ibb.co/Twc7W9Z 
The colors look cool but I wanna give those  parts a material look as well, like chrome, aluminium, etc..



edit 2: 
It is now like this:
and I wanna make it look like real material and shine like this:
Yes, you can in many ways. You can just mix RGB:


Or similarly you can mix shaders (here the effect is the same, but with different Principled BSDF settings it would differ):

Or you can do something more interesting:


If you have some specific textures in mind and a specific way to merge them, it would be good if you described them in your question. A texture with scratches could be added based on it's alpha channel for example.