Used a combination of metal blade in miter saw, jig saw, hack saw, grinder, hand file, oribi sander.
#1 was a challenge. I cut long to line with the thought of grinding to line. All the grinder did was melt the aluminum...needed to be "cut" Hand file worked well but was a lot of work.
#2 was much easier as I cut closer to line with miter saw/jig saw, then used hand file to form up. Orbi sander to clean up