Yeah, it will take some force to lift up the speed knob. But if it's a lot, then it might be time for a CLA. Actually, if you've never had it done before, it might be worth getting a CLA done anyway.
As for the numbers, the best solution is to remove the knob, sand it smooth, and reapply all of the numbers with a silk screening machine. That's going to be costly and difficult though. So I wouldn't do that. But that's probably how it was applied at the factory. The second best solution, and this is what I did to mine, is to just reapply them with a brush (I used a round 0000) and some enamel paint, like the kind people use to paint models with. It'll take a couple of day to a week for the paint to dry, and maybe a month or more for it to fully cure. But once cured, that enamel paint will hold up really well on metal. It doesn't look perfect, but it looks pretty good. I can easily read the numbers anyway, even if you can clearly tell they were applied by hand and not printed on.