The rear script is sold by a few online vendors, such as
Bumperplugs.com, or
Suncoast Porsche.
The steering wheel emblem is a tricky one, and most likely cannot be removed unless you're extremely skilled with this sort of task. Not saying it's impossible but more likely risky. The badge on my 986 is scratched a little on the black bar but not much I can do. If money isn't a real issue, replacing the airbag may be a safer, easier alternative.
Ah yes, the rubberized paint. My mother's '06 987 has the same issue (also has the Sand Beige interior). You can either A) remove the rubberized paint and leave black, B) color-match after stripping, C) use a vinyl wrap. At least it's not as bad as period Volkswagens were, good lord.