I currently use Copic brand alcohol ink refills to create my alcohol ink artworks.
I use these with 99% isopropyl and a hardware store heat gun.
I get a lot of questions about the surface I paint on. I use 12mm thick MDF (6mm thick when the surface extra large), these are cut to size by my partner and I. I then go through a rigorous priming and sanding process at least three times to make the surface how I like it. I suggest experimenting and playing around to see what works for you!