On Fri, 26 Oct 2007 09:40:56 +0100, diy-newby wrote:

How on earth have they done that?

Not applied to much in the first place (cut nozzle to width of gap),
applied in one long non stop operation, possibly masking, using a
professional sealant (these tend to be thicker/stickier than the DIY
formulations but skin quicker) and probably the most important, lots of
learnt skill.

--
Cheers
Dave. pam is missing e-mail