Grand Old Lady
I grew a mustache for 'Movember' about 10 years ago! Never again as it developed a dead skin, sweaty whiff about it and made me look even older than I do without one and without one I look older than I am. I kept it for the whole month, but come the 1st of December it came off, much to my relief!
Surely that wouldn't do your business of "hire a Sir Patrick Moore lookalike" any good at all to grow one?