Carbide bits will cut most anything. I use them almost exclusively in 60,40,and 30 degrees. It comes down to feed and speed. In wood and polyurethane plastic, I run at 30 in per minute at a max depth of .125. In aluminum, I run at about 8 ipm at a depth no greater than .010. In metal cool it somehow. An air jet is OK, but adding a water mist helps immensely. I dont use a 'coolant/lube' as my router is wood--i just use water. I also generate most of my gcode with VcarvePro which controls the depth.
In the words of the Toolman--If you didn't make it yourself, it's not really yours!
Remember- done beats perfect every time!!