what can i do against the fine scratches (after playing) in the clear varnish on my lovely vinsun-luke II?
Polish out from time to time?
Which polish uses you for this work?
If they're fine scratches (meaning you can drag your fingernails across them and not feel anything) you can use any automotive fine scratch and swirl remover. (I use Meguiars Scratch X, and it works great)
The only problem doing this, is that when you're done, the rest of your guitar suddenly looks pretty crappy compared to the nice shiny polished spot you just created!