I have the KNRM boats on my 'very optimistic future' wishlist for FD, and have done all the current ones in sb scale. if someone else want to tackle the KNRM boats, feel free to do so, but take in mind that you'll have to work from pics: references, if any, are small and low quality.
at your lifeboat: I would like some more shading to show the hull shape and the fender shape. also, I have doubts about the mast being so thin, and it would look better in black anyways. a bit darker colours for the bends in the shape to distinguish them from the detailing would help too.
EDIT: ow and I would love to see these being done in sb scale too