I appreciate and like how you make everything you are doing seem so easy, especially sitting in front of an electronic device on our end; aka: the sign of a master: making it look like a piece of cake to do the same!
Gotta ask: Why the focus w the Rad w specific tag? When so many other areas have been changed, seems more likely to save "correct" rad for when the #'s matching engine goes back in after good time was had by all w modified XX engine. Not intended to be critical, just interesting the path WE ALL take to perfecting our rides to our personal tastes...such as my fitting replacement 4-core Rad yrs ago in my W72's
The attachment below is info thought you might be interested in clear coating bare metal - Clear Diamond - which reminds me of IIRC Eastwoods' Diamond Clear?
Keep up the great work and excellent adventure!