Ruediger,
Very creative thinking and very realistic as well. I have to ask to learn from you. I am very intrigued. I would think you would have to leave the keel blocks in place while you treated the sand with diluted white glue. I'm imagining if you removed them the sand would fall into the gaps they left. How did you apply the diluted white glue and at the same time protect the timbers from it. Did you tape the keel blocks and spray.
To me this is like a magic trick. Please tell me how you pulled the rabbit out of your hat!
Thanks,
Ken