It's spendy but an automotive paint store can mix a matching color and even load it in a spray can if you prefer. The chances of finding an exact match in the touch up paints is slim but it's worth looking. You might get lucky. You might try model paint too. It's been many years since I built models but Testor's used to have a good selection of metallic colors.
Test a small out of sight area with alcohol. If the finish softens, it's shellac. If not, then it's most likely a lacquer clear coat over the paint.
For the handwheel I would roughen up the existing paint with a fine sandpaper then prime it before painting. Tape off everything you don't want painted. The primer will seal the old paint so you won't have any compatibility issues.
Rodney