I'm repainting an Airsoft .45 longslide to start off my Terminator pistol.
I taped the holes at the end of the barrel next to the sight, and tried taping the crease on barrel, but that tape didn't keep it's shape overnight so I ditched it.
Thanks for the tips. I'll definitely try that.I would suggest you remove the tape, and fill the thin gap in the slide and the port holes with a 2 part putty that cures hard, like milliput. Something you can put a small dab of water on, and rub it level with the surface. Though you may still have to do a small bit of sanding to make it invisible. The tape stands out like a sore thumb.
Also, pick up some blue painters tape and mask the areas off you don't want paint. You don't have to chip it off. Much easier, and it looks much better.