Underneath the calcium buildup is good aluminum. It will take CLR and tons of buffing, but it will eventually look new again.
After using CLR and steel wool you can start to see the good aluminum appear. The next step is to start polishing using a three grade polish.
Using a drill and a buffing wheel, I applied the first grade of polish and worked my way up. It took about a week to polish all of the screen door
Nikki finishing up some cleaning on the screen door. Wow! Almost looks like new!
That’s from using the drill; imagine what my face looked like