Hi, I am new here. I am about ready to get my Powder Coating set up soon. Just a hobby size with an electric oven for now

but need some help choosing a reliable low priced gun. I also wondered now that I bought a used sandblaster with "blasting sand" in it if that is the same as "playground sand" or "sandbox sand"? Should I be safe and get some other medium and if so, what is the best to use?? I also looked into the RedLine EZ35 but seems they are not selling in US?
Thanks,
Grumple