Xylene works well as a cost effective alternative to the KBS branded thinners.

Thanks for that!

As it turns out I did need thinners and ended up buying the KBS stuff but good to know in the future!
I had some slight channeling and the KBS at full strength didn't level quite enough so I thinned it 30% and the finish is fantastic.
Hard to tell in a photo but really happy with the result.

Cheers: Brettski... :)