Hello, I was after some advice please regarding the above. I have wooden window surrounds and sills which are a very dark brown. Walnut colour maybe. The sills are badly cracked and weathered so I rubbed back to bare wood. I applied ronseal 10 year walnut. It's ok, but the original stuff hides the grain of the wood. More of a paint than a stain maybe.... I don't really need to create more work by having to rub down the entire sorround as it's only the sills which are bad. How can I identify what this other stuff is likely to be please???