How do I get rid of acne on my upper arms?

Over 50% of Americans have this without even knowing it. I was one of them. It’s called “keratosis pilaris” I think, I’m pretty sure. It’s extremely hard to get rid of. It has to do with something genetic and it’s the way you are made :( so what is suggested online is:

1. drink lots of water for healthier skin in general.

-Directions in order-

2. scrub your arms hard but not too hard for 20 seconds. Never too long or you will irritate the skin. I’d say ‘medium pressure’.
3. use something like a gel or liquid that is meant for “deep cleaning”. That kind that really burns or feels cold when it’s left on. Just put it on and leave it for about 5 minutes. But remember I’m not talking about like a face mask where you peel it off. I mean something that sinks in and after 5 minutes it’s as if it isn’t there.
4. Use an OIL-FREE lotion after the liquid/gel is dried, and do two things with it: a. rub a small amount in DEEPLY, like RUB it in really, leave it for about 10 seconds, b. take a thick amount and just leave it on top of your skin, like a layer of lotion that isn’t rubbed in. Leave that for about 30 seconds and then wipe it off. I personally think this is wasteful of lotion so just use enough to get that ‘layer’.

also I think there might be some kind of laser treatment for it, but it’s expensive probably.