I tried that. Just too tight...Just couldn't get one to "stay put" in either the back clam shell, or the bushing itself. (Hard to "force a tiny piece of .002-.003 brass in such a tight gap) SO...I ended up brushing a super light coat of that bedding mix on both pieces, and let it semi-harden/cure... Enough to stay adhered... but yet soft enough to allow me to "tap" it on (and eventually off) the shaft with a small mallet. (I used thin coat of oil on crankshaft as "mold release" so it wouldn't adhere) After it fully cured/hardened, I gave it a "mist" of high temp paint (1200degree) over the "bedding" to finish. Figured that would take up any remaining tolerance and fill any "low spots". Can't get any tighter fit than it is now, without it being permanently attached.
On the subject of clutches, one other tip I have is...IF you end up with a "generic clutch" with the hard-chrome finish, I recommend taking a scotchbrite pad to the belt faces. (both sides) After dipping they have way too smooth of a surface, and evidently it causes a bit of slipping and thus heat. After my first long ride when new, it (clutch and belt) got really hot! Hotter than the original Comet that was on it FOR SURE. After I took the "shine" off it with a scotchbrite pad, it was noticeably much cooler and had better, more positive engagement also. Should help both the belt and clutch life in the long run.
Lot of work for a minor issue on a $30 part but, WTH, it's an improvement/solution to something that bugged me when riding.