Some sharing. Some have been quoted rm600 to do this.
I'll show you with the cost of rm6. Save money for better parts :)
Disclaimer: Do it at your own risk. I will not be responsible for any unwanted incidents from your own actions.
Basic preparations:Drain clog cleaner. rm6 - 30 depends
A small container. Deep enough to submerge the item.
A twizzer to hold the items.
put the item into the liquid for about 15 secs and wash it immediately.
the outcome will be corse and matte look. you need to polished it to clean & shine it. refer to the right(before polishing) & left (after polishing). :)
after dipping and rinsing.... look at the blackend shim when i leave it too long. Be careful!
my "new" pulleys.