What are your tips for Smooth pull then?
At its core it's a friction issue for a smooth bolt pull, as long as all contact surfaces are smooth (sometimes a light sanding of parts helps varies depending on manufacturers tolerance) and correct grease it used on parts.
Often a cylinder sleeve helps to reduce friction and ensure cylinder/hop align correctly as well for a nice bolt pull. A DIY guide is on this forum somewhere.
Putting stickers on your guide seems like a bad idea overall to me, as it wears but of the sticker may break of and get stuck to the piston or end up in your hop or barrel which will affect accuracy/performance.
Also the glue on most stickers is very "gunky" which may build up and cause air seal issues or oring damage to your piston.
The sticker solution you proposed seems equivalent to cracking an egg in a leaky car radiator, yes it fixes the issue now but its temporary and could cause more damage/wear overall.
Edit: also a lot of new people buy snipers tear them apart and don't put grease/lube on the parts as they accidentally remove it from the system. stock grease is always horrible I've found as its designed.to survive transportation and any condition not for performance.
If a sticker on the guide smoothes your bolt pull it's likely the cylinder guide slot has rough edges (seems to a common issue on Nov rifles from YouTube reviews) or rough spring guide I would feel them see if they seem smooth and greased enough.