[pianotech] Bechstein grand lid hinges

[John Delacour]

At 19:26 +0100 26/10/10, David Boyce wrote:

>JD, I meant also to say that I noted that the original screws were 
>blued steel. Custom screws I think, the lid ones:  very wide and 
>short.  I did think about trying to blue some steel screws, but in 
>the end felt that brass No8 would be OK, considering the relatively 
>light weight of the lid, and the spread of the load on the new 
>hinges.  (1 1/2" No 8 into the rim).

Brass screws are fine until they break.  Bluing screws is quick and 
easy.  Polish up the head with P240 > P320 > P800 paper, turning the 
screw in a drill chuck.  Then turn the head of the screw in the flame 
of a spirit lamp until it turns dark blue.

JD