You can waterbath can BBQ sauce ONLY IF IT IS ACID ENOUGH.
Not all recipes are.
Best thing is to use a tested, modern recipe that a responsible source (Ball, extension service, etc) bills as safe for waterbath canning.
If you really like your own recipe, you should test its pH before deciding whether it can be done that way -- but especially with something thick and colored like bbq sauce this really ought to be done wiht a proper (and properly calibrated) pH meter, not the little litmus strips that turn colors.
Good luck, have fun,
Pat