B
Icing is a two component catalyzed finishing putty I purchased at NAPA part # 765-2697. Very similiar to spot putty or glazing putty. It finishs very smooth. I have used in bodywork and I think it sands easily and seems to self level. I haven't used on a steering wheel but believe if you follow basic painting procedures should be OK. I don't think the oils in your hands should effect the paint. As stated above I haven't made it that stage yet. Good luck in whatever you try!
Dan