Seat tube narrower at top - which seat post?

I posted recently regarding a few issues I've had following a rechroming job.

The latest thing (which hopefully isn't a biggy) is that there seems to be a very very minor amount of material left over from the chroming process at the top of the headtube.

It is so thin its difficult to tell its there when running a finger inside the tube but it is visible (dark glossy colour) and the 27.0 seatpost that previously fitted now takes a fair bit of persuasion (twisting and pushing) to install.

Assuming I cannot remove the material (which lines about the top centimetre of the tube) should I just go for a 26.8mm instead? Or stick with an extremely tight 27.0mm?

I can see that a smaller seatpost will only be properly clamped where the tube is narrower at the top - will this matter?

Cheers

Rob

I'd take some wet and dry wrapped around a wooden dowel and remove any escaped material and get the 27.0 post fitting .........have you got a crappy bit of 27.0 tube to help you get the real seat post to fit?

Sorry to post again, you must get fed up seeing my name on your posts.....

Shaun

Not at all - your a lifesaver. No idea where I'd get my info otherwise.

Did what you said and 27.o is now a comfortable fit.

About to post another q!

Cheers