Sand down all of the vent and bench markings in the deck. Before you start scribing practice, practice, practice on a sheet of styrene. Scribe all of the expansion joints first. 80mm down centre line from front edge of wheelhouse. Add equivalent expansion joints on A deck promenade.
Joints are approx.
The bonus of doing this first is to shorten the lengths you have to scribe. Note that you should scribe the division between the bridge roof and the crew quarters at this stage as well. DO NOT scribe over the expansion joints. Take your time or you'll find out how to curse in 100 languages. Apply firm and even pressure, the scribing needs to be deep enough to withstand the sanding of the decks later on.