I am doing a wedding cake and groom's cake for my niece for next Saturday, which means I will have a busy week. My question is about the groom's cake which is supposed to be a hard hat and tools for a pipefitter. Thanks to CC I have found good photos. I baked a 9 x 13 chocolate cake today for base. I also baked a chocolate cake in a round stainless steel bowl to practice the hard hat. After I carved, shaped and crumb coated it looks pretty good. Now I am afraid I may not be able to get the next one done as good. Should I go a head and freeze this one until say Thursday evening? Can I fully frost it (buttercream) before freezing or should I wait till it is completely thawed? Sorry this got a little long. I am trying to get what baking I can done early. I will freeze the smaller cake layers plain then thaw.
Thanks for any advice.

Definitely you can fz it You can even frost it if you want.
To fz it completely iced, put it in the fzr UNwrapped for about an hour, then take & wrap it in plastic wrap or a plastic bag. To thaw, remove wrapping.
For plain cake layers, wrap before fzing and thaw still wrapped.