Daniel,
No great ideas on removing the lense other than a suction cup.
The horn is another issue.... I believe the rolled face horn was used 31-32 only. It was a horrible design, because it isn't designed to be taken apart, early throw away technology maybe? I think they realized the folly of this design pretty quickly and changed to the removable face. Problem is the newer horn won't fit a 31, it hits the clamp on the headlight bezel because its much thicker.
So, you're lucky to have the correct horn. I managed to restore mine but it was tough. I took a screwdriver and ground the end to a very thin edge with round corners and carefully began folding the lip pf the face back, unrolling it just enough to get it off. It took a long time, be patient or it will tear the thin brass cover! Once off, it's easy to restore the horn itself but the face is now the problem. I made a steel dolly and gently tapped the rolled edge flat all around. Then I stripped the chrome, annealed the brass lip and had a VERY THIN layer of chrome put on. I think they did chrome only, no copper or nickel as it's too thick. The horn and cover can be stacked together now but the little edge must be rolled back. I made two wooden dollies that held the horn, one for the face and one for the back, each shaped to fit properly. I put these in my lathe and used the tail stock to push them all together and hold them in place, just light pressure. Then I used a wallpaper roller, which has a small wooden roller, to push against the lip while running the lathe at the slowest speed in back gear. By rolling the wooden wheel sideways and applying stiff pressure, is slowly rolled the brass ring back over. Just about the time it was done, the chrome started to peel!!!!! I stopped there and finished the last bit by gently peening it over with a small rubber mallet. It worked well, but if you look closely, the chrome is peeling in a spot or two, dang it!
Hoe this helps!
Gene Harper
