Doing this on the weekend as I misplaced my lube. Plan to follow no shoes ...i have read that post a couple of times before. The point of retorquing is to bottom out stud, and take up any slack after heat cycling. So I had planned to remove a stud at a time (need to loosen them to overcome friction), to relube both ends and the nut face. Then use hex socket to install stud, followed by torquing the nut to 65nm...5 times per ARP instructions.
I Won't do it in stages 25,50,65 as that is for first time install when the rest of head might flatten further each time and probably helps position head and gasket.
No shoes says do it on cold engine. All the above is based on readings and a little logical (or illogical) thought, I could be wrong. At end of day I could be making it worse if it's already been retorqued, and was retorqued to 70nm and I only do 65nm.
If it's not oil I don't know what else it could be. Felt like oil on my fingers.