According to a Morgan dealer the distressed leather is not that good in damp conditions and therefore not recommended for the M3W. Rumour or fact?
Morgan France got troubles with distressed leather when it got wet with rain on a seat side, it showed non removable marks and since then they refuses to sell it again.
Like Steven, I had distressed leather (black) from Muirhead in my AeroMax. It did get wet (it's a Morgan!), but did not show a watermark.
My current Aero SS has distressed tan leather from the other Morgan supplier and it has got soaking wet on several occasions, again it has not left a watermark in fact it's ageing imho even better than the Muirhead leather!
I have not heard any adverse comment, similar to the French Morgan agent, about distressed leather; nor from the factory. I believe the leather to be used on the 3W is from Muirhead and as such, personally I don't foresee a particular problem.