You are talking about 16mm right? or Super 8? or 70MM?

The reason I ask is I have an old B&H 16 projector I crank up every so often to play the 16mm films I made in my college days.
I stored up on the bulbs, splicing tape and leader when I found a place going out of business in CA about five years ago and one here in PHX that went out of business shortly after.
I would buy lots and lots of white leader and some splicing tape. I usually put about 15 seconds worth in front of mine for safety reasons (see below.)
I don't know how familar you are with running a film projector but since they are "vintage"...lol...the word now used instead of old...if you are not careful the PJ can tear threw a lot of film before you figure out the quirks of your particular projector. Because of this nifty feature of old PJs I sent everything I have on film out to have digital backups made. Just incase.
Any film you have, if it is old, will most likely have a few torn sproket holes. Most projectors are forgiving of this. EXCEPT when you are threading it. That being said,, mine is a PITA sometimes and will sputter and jump. But that is usually easy to fix. I have some editing splicing tape (I used to use it in the film editing bay days...I am only 48 but in filmschool we used to use the old AB roll editing decks.) When I locate the problem area I just stick the film on my splicer for hole registration and mend it.
The newer "vintage" models are self-threading (as it were) though mine is not. I actually prefer doing it myself. My friend has one that self-threads and it chews up film from time to time. The PJ will usually just chew away the first couple of inches of your leader. This goes back to what I said earlier about putting extra leader on your films.
As can you tell, taking care of film is a labor of love. But there is nothing like actually touching real film or the smell of burning dust from a rolling projector. I remember getting to edit my first reel of 35mm film and...well...I almost had an inappropriate physical response...LOL.
I might be able to answer some questions for you if you have any (assuming you are talking about a 16mm or Super 8 projetor.)