Hey lazarenka!
Strong hands is definitely a plus, but a lot of those holds and spins take a lot more than grip strength!
Chrome is definitely a type of pole finish that you really need to warm up, and you have to be warm as well, in order to get proper grip! Things like humidity and ambient heat can also affect your grip. Many people on here recommend using grip aid, and it might be a good idea if you find your pole is super slippy all the time. Definitely make sure you're warming up both yourself and the pole, though!
As for those holds specifically, as I said, it takes a lot more than grip strength! Things like the split grip is very tricky, and you need a lot more strength and awareness in your lats, shoulders, and upper arms in order to do it safely (as well as proper hand positioning, to keep your wrists safe!!).
For moves like the chair, for example, pulling down with your lat and your shoulder is really important so that you aren't putting all your weight on the small stabilizer muscles in your shoulders, because they can't really take that kind of punishment. If you're new to the grip, too, it takes some time to get used to- sometimes you'll slide right off, and sometimes you grip too much! Momentum is also something to take into consideration, as it can change how you hold, and how well you hold.
And neither the Hollywood nor the Chair are beginner moves.
As for the bolts that stick out, what happens if you tighten them? This sounds dangerous, and hopefully they aren't some kind of factory defect. I wouldn't dance on a pole with things sticking out! I'd cut up my legs something fierce!
