[etech]

Isn't there a risk when you do it that you remove much of the cad plate and you are then only polishing the steel? So later it goes dull and then rusts maybe? Also, it is far from original... but thats personal taste.

Yes, I think it is a matter of the condition of the chassis when you get it. If you notice the Philco 90 chassis I did, it was cleaned with mineral spirits and remained otherwise untouched. The aluminum cans were cleaned, but that is how aluminum looks when it is new.

Now, as far as the Philco 650B chassis, it was so badly stained, that it was only one step away from needing painting or replating. I do not store my radios in damp environment, so I don't think rust will be an issue. But if it is, then the chassis will require no more than painting or re-plating (owners choice here) which is what I would have done, had I not been able to clean it up. So, in my opinion, nothing is lost.

Overall, I think each owner/restorer has to make a choice on the level of cleanup for the chassis based on its overall condition and the level of appearance he/she is willing to accept.

Ed