"Not sure how an actual aluminum spinner would work, but my airplane’s spinner has the ‘look’. It’s standard fiberglass but looks chromed. It’s done by some sort of chemical process by covering it with one chemical, waiting a bit and adding another and it turns shiny. It’s held up really well. Kracon Aircraft paint in California did the job and would be able to tell you exactly how."
That sure does looks nice, and is a possibility I didn't know of. Thanks to this very forum.
For the aluminum spinners I am aware of the difficulties adjusting the pitot - that's why I asked. Cummins Spinners advises to buy both a new backplate and front-plate from Van's, so that the whole adjusting process can be overdone per the manual.
I have tried aluminum Oracover, but as mentioned the overlap is quite large..
The trick with the long drill sounds nice, however I still cannot visualize: the only place this drill is to be supported is the small nylon piece behind the gear.