I was going to prime the attic with white primer. To me it isn't a
"let's wow 'em" but to remove the "damn, that is one ugly color"
thought.

The other rooms are going to be painted standard colors,
offwhites and the like. I looked at a house last week that had walls
that had been painted dark colors then "sponged" with lighter colors.
Every room - and they had just done it.
I just read about using vinegar and hot water to remove wallpaper, I'll
give that a go. I hate wallpaper anyway, whoever put it in these
bathrooms should be smacked. Neighbors had theirs done, even with a
vent fan it peeled in several years (I questioned the quality of the
install, but paint at least holds up a while).