i recently purchased the online deal from GM and i was wondering how to remove the breech plugs for cleaning so that they don't end up like the barrels which they are replacing. the instructions that came with them did not specify if they could be removed or not so i thought i would ask. also i was wondering if other than voiding the warranty is there any reason that these barrels couldn't be refinished to look more original. im not sure if stainless steel would even take blue or brown?

thanks for any help you can porvide
James