Slip 2000 ? Is that a vehicle Parts store Item
Slip 2000 Carbon Killer is bought from Brownell's, Midway, and many gun shops.
It's not an auto store item, it's a gun item.
Buy the big jar and SHAKE IT WELL, it separates and settles fast.
Brake cleaner is mostly a degreaser.
Auto stores do sell dedicated carbon removers, but be careful.... some may attack the finish on gun parts.