Also, if you have a sticker kit finish that is glossy and made to match with a clear coat then you won't get a clear coat with a powdercoat.
As
@ozzybmx mentioned, mask those threads and try to find a soda blaster and powdercoater that is familiar with working on bikes before.
It sounds pretty important to strip or soda blast the old paint with a minimal delay before it is painted to avoid any surface impurities, like dampness from humidity or body oil oozing from our manky bodies, that could mess up the final finish. They seemed pretty keen on this one and needed to seal any bare metal sooner. Then I thought of all of the naked finish alloy bikes I have seen in my time that seemed fine, but I digress.
You also don't seem to have the wide range of paint colours with powdercoating compared to spraying. More like primary colours and not 15 shades of everything that most non powdercoaters seem to be able to blend up.
I also have to do this soon but put it off due to the humidity here and unfortunately finding other things to do