I would not use anti-seize on the slides. It will gum them up and dry out.
Use dielectric grease. Its safe for brake rubber and will not dry the same.
Did you actually read the post? He didn't say he wanted to use anti-seize.

Pretty sure you're specifically not supposed to use tune-up grease on caliper pins.
I've coated the pins in the wrong material too by accident. I ended up cleaning everything out with shop towel pieces wrapped around picks stuffed into the slide holes and completely removing the rubber boots from the caliper bracket and cleaning them on the bench. All I can say is good luck.

Additionally, are you sure the purple stuff is supposed to be used on caliper slides? I thought the "green stuff", the ultra disk brake caliper lube or the "red stuff", the silicone formula was supposed to be used there. Maybe I'm a bit too anal about brake lubes. Lexus specifies THREE different lubes when replacing brakes. Ug. What a pain!