I have cut 1095 steel, brass, aluminum, epoxy, hard and soft woods, plywoods and particle boards. Other than making some small adjustments from manufactures recommendations I have been running everything at full speeds and havent had any issues to date.
With the right bits and speeds you should be able to cut any material with 1F. I think the question should be is how efficient is it at doing those materials. With the size of the stepper motors and power of your spindle you will not be able to cut as fast as say a production cnc but you still can cut the same stuff just slower. Some materials may need additional oiling during cuts which you could do manually but it would still get it done. I used wd40 when I cut the 1095.