Hi Brian
Would it have been easier to have used it as a sacrificial anode to attract the rust from another piece of rusty metal?
The rebar that I used became covered in rust from the propeller gear.
Hark at me giving scrap metal man advice!!
Seriously though, thanks for the advice re this.
I really enjoyed the process and am pleased with the outcome.
Gerry

Hi all,
I really am most grateful to you all for your advice and assistance with this little project.
I am now happy that 95% of the rust has been removed using electrolysis.
That process has left a dark, almost black, covering on the cog which I am going to get removed tomorrow morning using soft bead blasting.
The company doing this are happy that it will not damage the cog or teeth. (they usually use this process on Aga’s and vintage car parts requiring chroming)
I will post some pictures tomorrow of the before and after.
I have also ordered some DEOX C and will use this as on some other small parts that I have for comparison.
Once again, many thanks for all of the advice I have received.
Kind regards
Gerry

Dear all,
Here is a picture of the cog after its first four hour stint in the bath. The original picture is on the left.
There is definitely an improvement although it is obvious that it will take another long session.
[ATTACH=CONFIG]244700[/ATTACH]

[ATTACH=CONFIG]244699[/ATTACH]

Lysanderlover, I suspect that is an expensive piece of kit but very impressive. I wish I had my hands on it for a few minutes.

Cheers
Gerry

Cheers Brian
I am looking forward to this.
The piece is really in a bad state so it will be a great test.
I will place some ‘then and now’ pics as soon as i can.
Cheers once again
Gerry

Dear all,
Some great advice which I really appreciate.
I will try the Deox c method first.
(I am not sure how to rig up an electrolytic rig without electrocuting myself to be honest).
If I have no joy with the Deox I will ask for IKEA type instructions on how to build your rig.
Thank you all once again.
Gerry

Cheers for your replies.
I will look into the possibility that it belonged to the beech.
Unfortunately there are no markings or plates.
Cheers
Gerry

Gents
Thanks for your advice re the compass points.
I hadn’t noticed that before.
Yes, definately a Kings Crown on the wings so pre 1952.
Thank you both.
Gerry