Does anybody know a good anodizing spray so I can put it on regular aluminum?
Anodizing isn’t a spray on treatment, it’s more like an electroplating process.
Google how to anodize aluminum and you’ll see videos about doing it.
It’s a pain and requires a fair amount of stuff, it’s usually way easier to buy it.
https://www.jpplus.com/cermark-lmm14-6oz-metal-marking-spray this is a spray to mark on metal.
Regular paint like Tremclad works great if you clear coat after you laser it.