When I put together my bird room, I bought life-sized photographic murals of beaches at sunset & rain forests (plus one of an under-water walk-through in a salt-water aquarium) to cover the walls & then affixed plexiglass panels over them to protect the murals & to make the walls super easy to clean. They've been more than worth the effort & expense although that was back before I could no longer work & when I had the money to spend.
Sandblasted Manzanita isn't slippery but branches with the bark still on are very slippery. That said, there are so many different types of surfaces to perch & play on both in & out of my bird room that none of my birds ever perches on any one type of perch often enough for the texture to become a problem to their feet...especially since they're almost never confined to their cages. They do all seem to really like the thick sisal rope "vines" throughout the room best though...even my little guys.
Both my goffins are messy as far as tossing toys (especially Audrey who loves her box of foot toys while Angel prefers hanging toys) & shredded paper around but then that's a good thing; they're busy playing when not napping or eating.

Which kinda refutes the notion that parrots pluck due to boredom.

I can guarantee there's not a bored feather in my household. LOL.
I don't think anyone really knows why some birds pluck. Some might pluck from boredom or anxiety, others from hormones & still others for no known reason but plucking isn't necessarily a sign that any of these conditions caused it or even existed for a particular bird.
One of my Goffins was a plucker when I got her from a less-than-desirable situation. & the other began plucking to a much lesser degree when she was about three. Audrey plucks primarily during breeding season but only the long feathers, never the down beneath. She's actually kind of cute during that time all soft & fuzzy & tail-less. I call her my little emu.

Angel, my semi-rescue Goffins, pulls everything down to her bare skin during the same period & then lets many long feathers & a little fluff grow in between breeding seasons.
I really don't care about plucking. As long as they're healthy, happy & not self-mutilating beyond just feathers, it's fine with me. I think many people get overly concerned about it & probably even make things worse by subconsciously transferring their anxiety about it over to the bird. I'm very lucky though, neither of my Toos does the morning & evening screaming thing or even screams at all beyond a couple call outs once in awhile if I leave the bird room before they feel they got their fair share of the attention. None of my parrots are screamers. Sorry, got off topic.
