Thanks for your reply. Yep, once upon a time ...
I was contemplating buying a black thomson seatpost and having it re-anodised silver ... has anyone had any experience at this?
(but a large part of me thinks that such a move is a step too far ... that I should stick with the slightly shabby and bent post ... after all what would bikesnob say!)
If it's anodized black you could just strip the black and hey-presto - a silver post - there are literally HUNDEREDs of posts online and one in particular for a syncros post - i hear oven cleaner is a prefered solution because it is a more dilute caustic - too strong gives 'pitting' apparently.
I plan on doing this as a silver syncros post is less common than black - you can get the decals on ebay for £6 or so.
Thanks for your reply and interest.
I've talked to Thomson ... and a local anodising establishment ... and they both say that the bare aluminium is anodised 'silver' (ie a silver dye) and not just left as raw aluminium which would dull into a grey finish (not structurally any different, but not shiny silver!)
Either way, I have managed to find a silver Thomson 27.0 (thanks titanfreak) so will not have to explore this avenue.