Many years ago when we had parts gold-plated for the space-business, the process used potassium cyanide as one of the plating bath chemicals. Don't know if there's an alternative, safer process but I personally wouldn't go there with cyanide (always assuming you could actually get hold of some).

Edited By Bandersnatch on 16/01/2019 01:55:43

Well first you need an EPP licence for the potassium cyanide (despite this people still seem to be selling kits on ebay). Have you checked with professional plating services? it may not be as expensive as you think especially if you are not in a rush.
You don't have to polish the surface but it will "enhance" the finish. So polished, machine turned or consistent sand blasting is OK but if there are scratches or odd marks they will show up.

Robert G8RPI.

I don't know if its appropriate in your case, but have you considered gilding with gold-leaf?

Surprised nobody has mentioned the plating article in the latest MEW (No. 276) yet – I'd suggest having a read of that and maybe contacting Gateros Plating for advice.

As a one time electroplating chemist and company owner, I wouldn't recommend a DIY approach to gold plating clock parts.

As Mick says the preparation prior to the gold deposit going on is critical and exacting; there is usually an intervening bright nickel coating involved. There are also many colours offered in plated golds, you may want to have a look at samples before selecting one. Wear resistance is also a factor that needs be addressed.

None of this is easily done by the amateur.

Your easiest approach is to contact a manufacturing jeweller or small plating outfit. Brmingham used to be full of them.

Eugene

Gold plating kits are hazardous, but I've bought stuff from Gateros and I can confirm it comes with excellent instructions AND full manufacturers safety data sheets.

I would agree that you seek their advice first rather than just diving in.

Neill