from what i recall from an interviu w/ crumb bobka, in his early work (mid to late 60s) he not only didnt use whiteout, he didnt even pencil in first. he just inked directly. he didnt know about penciling. later on he did, and also using whiteout to correct shit.
with a little good will from everyone involved (ha), there doesnt have to be a conflict between tour posters and gig posters. in a sense they're different animals. a tour is national or whatever, a gig is local. tour posters can co-exist in the same venue and city. side by side. the analogy is: an artist designed a cd album cover, and then other artists may design the cd singles or ep covers. album=big tour. single or ep=gig. it's natural for the tour poster to be commissioned by the band people, the gig poster by the venue people.