I've not looked up your parts, only read your text.
I assume your doors are not 30mm of alluminum at all! They must be a couple of skins.
I spend my working life routing alluminum on CNC machines. I use single flute cutters and cutting fluid.
For jobs where I need the finish to be visually perfect (virtually all of my work) I make a roughing pass, leaving on the last 0.25mm on the radius of the hole, and then skim it off with a finishing pass, where the tool plunges in the center of the hole, and moves to the edge to skim the last 1/4mm off.
So, for your job?
Use your template and cut through one skin first, then plunge further to the second skin. Hope youre not cutting somewhere where there's internal stuff going on.
If you can use a single flute, that will give you the best finish. I use carbide, but, sadly, the cheap from China single flute carbide are just no good. The cutter geometry is so poor and they just push a burr.
I'd you're not in a hurry, look at the American firm, rlshmitt (or somthing like that) and try and find something similar here. It's going to be the tip that wares soonest, but this is easy enough to refresh on a diamond wheel. You don't need fancy tip profile if you are plunging away from the final cut line - you just need to get it through the work, so don't worry about tip profile, or not being able to recreate it after sharpening.
Plunge away from the edge and move toward it, as you may push a burr on plunge.
Use a cutting fluid. Don't go and spend out on 5 gallons of whatever. Somthing like standard road diesel would do you. Kerosene cleans up even easier but people get jumpy about that burning down everything. Kerosene may be better for you though, as I'm assuming the doors have got to be double skinned at 30mm...
If they really are solid, just outsource.