Oneshop Redding Cutting Aluminum

After acquiring the aluminum stock and endmills to cut it, I need to figure out what feeds and speeds to start cutting the material to achieve a decent outcome.

I started with a flat plain cut to remove some of the access material and give it a smooth surface to begin my next operation. I didn't realize till I started cutting that the aluminum stock is not perfect perfectly flat on top, I added an extra 0.5mm to the top of the stock to clear it off in case it was imperfect, which worked out well.

I set it at 203mm/min (8in) and 0.5mm stepdown with a 1/4" 4 flute endmill. I can probably have more of a stepdown and even increase the speed, but I'm playing it safe for now. These bits are seriously expensive, and I don't want to ruin anything in my first go.

The outcome was not a huge success; the tool edges were a bit worn just slightly enough that it left some stock when it should have cut. The chip evacuation wasn't the greatest either, so I'm going to try using compressed air and silicone wd-40 lube to give it more of a chance. Overall though the places it did cut have a very nice finish to it, something about CNC cut aluminum feels so good, such a perfectly smooth top.

The sound of the machine didn't sound like I was hoping. So for the next cut, I'm going to lower the optimal load on the bit, which should decrease the size of the chips and have a smoother finish. While cutting the aluminum heated up quite a bit and got to the point where it was too hot to touch, I think the reason why it was heating up so much is because of chip evacuation; the chips couldn't get out fast enough and so were recut and started welding with the tool. The outcome was a very rough finish and a definite color change along with it being much sharper of a surface finish.

Attempt number two, it was more successful than yesterday, I bought a can of wd-40 silicone lubricant and sprayed it periodically while it was cutting, and that did the trick, I sped it up quite a bit faster than before, and it kept up. This time the aluminum only got a little warm and all the chips consistent and small. It sounded much much better than before and had a cleaner finish. 
I tried running a few cleanup passes but didn't quite get them down right, so I ended up cutting places where I shouldn't. Very pleased with the outcome, even though it didn't look as clean as I would have liked. One thing I keep forgetting to try is compressed air that would remove the chips from getting recut, and I feel it would keep the material from overheating.