filled a bucket with lid and placed a few mini parts into for a week.leave the lid on and leave it out side .
all you need to do is wipe the grease off before hand and wipe them dry when they are finished. forgot to take the before pictures but look at these mini hubs aren't they good or what.

since doing these hubs i have found out that white vinegar works fine to and is a lot cheaper
oh my hobby is restoring,modifying and driving minis