Hello Douglas,
I've been following Dulverton for a while but don't think I have commented before.
The station buildings and hotel are really very impressive, and more generally I have enjoyed following your layout progress.
In particular I have been interested in your recent trials and tribulations with lint / grass. It's something I toyed with a year or three back, but was disappointed with my experiments (maybe for similar reasons to you) ... so put the whole thing on the back-burner.
Either way, I'll be interested to see how you get on with further experiments - good luck!