I've had to clean up a few fins after dropping the head on the ground. Flap disc; 100 grit and a 220 spit shine on the ends took care of the damage. The more fin you sand off the thicker they get. Theres a lot of meat in there so if you want to shine the ends of the fins, take the edge off with a flap disc and then smooth them out. Don't go nuts though. Afterall they're there to keep youre engine cool.
I helicoiled the cam tower threads, checked all the guides, and added some rc aluminum retainers. Unfortunately one helicoil bound for a split second and snapped the super cheap insert tool off in the hole. Ill be working on that later.
After the metal work was done the head got a bit of a chemical clean and coat of paint. It sat for about an hour and then I sanded the edges of the fins with 220 grit to remove the paint. Classy.
The cyls got scuffed, honed, cleaned, and repainted as well. The old gaskets were of course a pain to remove.