Best Carbon Removal Method

[ratski]

So, digging thru some parts and accessories and came across a bolt carrier group (AR15) that has just baked on carbon.
I hate to say it.
Not sure when it got put in the "box 'o stuff" but...
Carbon is baked, and I mean baked, on it.

What is the best, safest way to get this stuff off?

I've heard it all (I think)
Brake cleaner
Carb cleaner
Easy off oven cleaner
Ultrasonic
Mineral spirits

So, anyone have a tried and true method that works?
I'd like to see if the carrier and bolt are blue or nickel?

Thanks

 

[rc508pir]

CLP bath for a couple of days

 

[madokie]

coke a cola,people use it to free stuck old engines' loose.

 

[TwoForFlinching]

Not sure where I got it, bit I use a scraper stamped out specifically for the bcg shapes. Otis maybe? For really stubborn and baked on parts, I'll stick it in a bag dripping with Kroil for a few days.

 

[Snattlerake]

https://www.amazon.com/CLENZTEC-Cleaner-Solvent-Scrubber-Deposits/dp/B0CCZ1C48T/ref=sr_1_10?

 

[swampratt]

For aluminum piston carbon I use Formula 88.
Home depot and lowes both have it and it is under 8 bucks usually.

That stuff cleans many things around the house also but I never tried it on my gun parts.
It does not hurt my steel rods or wrist pins at all.. does not hurt my cast aluminum either.

 

[Steelers Fan]

Berryman's B-12 carb cleaner. It's the best. Use with care. One drip or drop will take off paint and can melt or damage plastic. No real need to soak. Get her wet and scrub with old tooth brush. Dissolves on contact.

 

[bas402]

Just get an ultrasonic cleaner, put your parts in, 20min later…completely clean, been doing it with my BCG’s for years.

 

[BlackRifle]

For the brass on my Henry Big Boy I use Mothers Mag and Aluminum polish. For everything else I use Colonel Brassy hard surface cleaner. Both work excellent with little effort.

 

[Jason Freeland]

Not sure where I got it, bit I use a scraper stamped out specifically for the bcg shapes. Otis maybe? For really stubborn and baked on parts, I'll stick it in a bag dripping with Kroil for a few days.

I have one of these, but there are many brands of them. They all seem to do the same thing, scrape the carbon off.