Cheers Guys.
After 5 builds using TO as a top coat the outcome becomes a bit more predictable on each subsequent build. What I learned on Swampy was to wet sand frequently and once the thickness had built up use wet & dry grit paper to apply the finish diluted down. Still need to alternate with a rag now and then but when it gets super shiny, rag works ok just after a light W & D sanding but too smooth for the next coat. Applying with W & D grit paper takes a lot longer too but a lesson in patience does have it's rewards.