Ralph,
I have a partially completed model of a Billings kit which uses the same method of construction. If yours is like mine then the kit contains two plywood hull profiles to which half section frames are glued and then the planking is attached over the top.
The plywood hull profiles provide the shapes of the keel, stem and stern of the model so what you need to do is to plank just short of the extremities of the hull profiles. This means that the ends of the planks, particularly at the bow, need to be chamfered to get a good gluing surface. It is also a good idea to introduce wood filler into the wedge shaped gap behind where the planks meet the plywood hull profiles. Ronseal two part wood filler is very good for this. When everything is glued and set you can sand the planking around the bow so that the plywood profile protrudes to give you a 'stem piece' of the right shape. This may entail sanding through the ends of the planks in which case you will be glad of the filler underneath!
When laying the planks you will also inevitably get gaps along the length of the hull as the planks will not always lie the way you would like them to! These gaps can be filled in with 'stealers' (short lengths of planking tapered to fit) and filler. It is usually best to start planking from the top and bottom of the hull and then sort out the gaps where the two lines of planking meet!
The whole hull then needs to be sanded down to a smooth finish.
The hull of the original ship was built of steel, not wood, so there is no need to show any planking on the model. You can either paint the hull as it is or you could represent the plating using gumstrip paper which, when sealed, will take paint very well.
Hope this helps,
Colin
Edited By Colin Bishop, Website Editor on 18/01/2014 17:57:18