There could be any one of a number of things wrong with it, depending on the context. For one thing, it doesn’t work as a post-modifying adjective, so you’re out of luck if you want to use it that way. It also might not suit the literary style of the surrounding text. Compare the following pair, which illustrates both problems:
WoodenTaco was renowned as a master of all things culinary.
*WoodenTaco was renowned as a master of all things guitar-playing.
Isn’t that a verb, not an adjective as is ‘culinary’?
‘The passage in question demonstrates the pianistic nature of the music.’ - replace ‘pianistic’ with your adjective. Does it work?
Or what psychonaut said.
“Guitar-playing” as John Mace was using it is not a verb but an adjectival gerund.
Nah, it has a rather nasty near-homophone. Imagine the shock and disgust from your audience when they mistakenly think you are waxing lyrical about your “catarrhic skills”. :eek:
That was on the tip of my tongue 
The latter is grammatical for me, but just doesn’t mean the right thing. I parse it as meaning WoodenTaco was renowned as a master of all things which play the guitar.
In that case I would say one of the following:
*WoodenTaco was renowned as a master of all things guitar-related.
*WoodenTaco was renowned as a master of all things guitar.
*WoodenTaco was renowned as a master of all things guitaring.
I think “guitaring” is the closest.
To me, the one of those that works the best is the first, and the last one isn’t quite grammatical, or, at least, can only be used to mean “WoodenTaco was renowned as a master of all things which guitar”, where “guitar” is some sort of verb. But perhaps in your dialect, idiolect, or just your conscious estimation of things, the situation is different.
Also, just to let you know, I think psychonaut was using the asterisk to mark ungrammatical sentences (i.e., sentences people would not actually say, would find jarring to hear, etc.), rather than just as a bullet point.
yeah, then we’d have a bunch of hotshots calling themselves Luteius Maximus.
In that context, maybe a more appropriate word would simply be “musical”, since culinary encompasses all of cooking. It’s not specific. Intrumental would work too, in that context, as previously mentioned.
Oooh! i think I actually just thought of it!
plectral
Although the term is a little broad, could apply to banjo, lute, balalaika and mandolin also.
Shredding