Electrochemically etching COLNAGO logo on an old stem

We are using an old 3T stem to test the process of electromically engraving/etching Colnago logo. First, we grind, then polish the old stem. The chemical process contains a salt bath made out of warm watter, a steel conductor and a battery charger. We etch the Colnago inscription on the sides and the Colnago logo on the front by emerging the stem in the salt bath and plugging in the electricity. Hope you enjoyed this video and thank you to @Buffs Vintage Bikes for sharing this cool process. If we ever redo this process again, we will learn from our mistakes. The biggest mistake was running the reaction for too long: 15 minutes should be the maximum. Hope you enjoyed this video. Let us know in the comments if you have any questions/comments. Please SUBSCRIBE and help us grow our channel by sharing.