Moulding the sea for a small-scale model
Border the edge of the wood base with square beading, say quarter inch, thus forming a shallow tray. Fill the tray with plasticine which can be softened in a microwave oven. Form the sea shape by rolling a fairly large marble or ballbearing on it. Cut out the hole to fit the ship. Remove ship when it is a perfect fit. Mask off wooden edging with masking tape. Using Humbrol gloss paint, paint main sea colour (I use a medium blue). Whilst still wet paint troughs a darker blue and add white caps, bow wave and wake. Because it is still wet, the colours will run into each other giving a very realistic sea effect.
For examples, see 'models' section of www.merchantnavyofficers.com
Plasticine is permanent and actually goes hard over the years. Models I built thirty years ago using this method are still OK. Bob Wilson