Thank you the info Andrew.
I tackled it today and you're right. It is runny and tacky. I just kept wiping away and it cleaned up reasonable.
As it's an isolated section and I won't need to go there for a while, I shall leave it be and let it dry. I went down and read the can and it said it must be 70 degrees F to cure. Must wait for the summer.
I've continued my blog on the Gry Maritha page and have photographed it.
Hey Ho, thank goodness for Model Boat Mayhem.