I am looking for a non-electric rotary shaver. Many years ago a friend showed me a razor he kept with his camping gear that was powered by a draw string that he would pull and the razor heads would spin for 20-30 seconds then he would have to pull the draw string again... I realize it sounds like a lot of work, but I am trying to be environmentally friendly. I have radios and flashlights operated by a hand crank and they work great. If anyone know where I might find a non-electric rotary shaver I'd appreciate the assistance.

I’ve been struggling with severe razor bumps and irritation pretty much since I started shaving at 13, and I’m genuinely at my wit’s end.

I have very coarse, tightly curled 4C facial hair, and no matter what I do or how I shave, I ALWAYS end up with razor bumps, ingrown hairs, and irritation.

Over the years, I’ve tried pretty much everything I can think of, including:
Multi-blade razors
Single-blade/safety razors, at home and a barbershop
Electric foil shavers
Philips OneBlade
Regular beard trimmers
Waxing
Magic Shave powder
Pretty much every razor bump prevention product on the market
Tretinoin and various skincare products meant to help with ingrown hairs
I’ve also experimented with different shaving techniques, but nothing seems to make a significant difference.

The frustrating part is that I genuinely hate how I look with facial hair. I feel like having a beard ages me so much, and I strongly prefer being completely clean-shaven. But at this point, it feels like I have to choose between having facial hair I don’t want or constantly dealing with painful bumps, irritation, and damaged-looking skin.
I’m seriously considering just getting laser hair removal because I’m so tired of dealing with this, but before spending that kind of money, and doing something permanent, I wanted to see if anyone else with similar hair has found something that actually works.

For other Black men with coarse, tightly curled/4C facial hair:
Have you found a razor, shaver, or shaving technique that actually prevents bumps?
Are there any products or routines that made a noticeable difference after trying everything else?
Has anyone gone through laser hair removal specifically for razor bumps? Was it worth it, and did it help long-term?
Is it even realistic to get a completely smooth shave with this hair type without constantly getting ingrowns?
I’d especially love to hear from people who used to have really severe razor bumps and actually managed to get them under control.
I’m genuinely open to any advice at this point. I just want to be able to shave my face without my skin looking and feeling terrible afterward.