Joe,
You are correct about the scoop, have it painted separately and then reattach with the fresh screws, mine are stainless but they may have originally been chrome. The plastic clips are readily available for reattacing the chrome trim as are the other alligator clips for the aluminum trim, any of the suppliers (Buds, SLS) can get them to you. Finally, yes, remove the headlight bucket before painting, and while you are at it remove the gommets and mask off the wiring as well. I don't know if the original fasteners were slot or phillips, mine were phillips.
Best,
g
'64 230sl, fully sorted out...ooops, spoke too soon