Hersch,
I have done what you are asking.
1. If you want a silver horn there is no reason to not have it plated.
2. No you do not have to replace all of the springs if you are careful and you label everything.
3. When I did it, I disassembled and stripped the lacquer myself. It can be done if you know how to do it and keep every thing well organized.
4. Buffing... I would say not to do it. Hand polish if you want burnished. Or better yet have the horn glass beaded for a "frost" finish so you don't have to buff and loose metal.
5. Engrave before the plating. If you buff after the buff. If you glass bead it can be masked.
There are Tricks of the Trade that can be used. If you know a good tech see if you can work out a deal where he can supervise and make sure you know the best way of doing things.
Best of luck
I have done what you are asking.
1. If you want a silver horn there is no reason to not have it plated.
2. No you do not have to replace all of the springs if you are careful and you label everything.
3. When I did it, I disassembled and stripped the lacquer myself. It can be done if you know how to do it and keep every thing well organized.
4. Buffing... I would say not to do it. Hand polish if you want burnished. Or better yet have the horn glass beaded for a "frost" finish so you don't have to buff and loose metal.
5. Engrave before the plating. If you buff after the buff. If you glass bead it can be masked.
There are Tricks of the Trade that can be used. If you know a good tech see if you can work out a deal where he can supervise and make sure you know the best way of doing things.
Best of luck