Excerpts of my comments at a seminar given at the recent IPMS Nats ...
Paint the PE fret at the same time you are painting the ship. The color should be the same as the bulk of the supestructure behing the rails. Add camo color with a hand brush after installation. Touch up and nicks & cracks in the railing paint then too.
Work in short lengths - three or four inches at most. Resist the urge to apply an entire side of railing in one installation. Measure using a draftsman's dividers. Measure between logical end points (ends of previous railing runs, bulkheads, gun tubs, etc. ). Note gaps for ladders.
Cut using a #10 Xacto blade (round blade). A #11 is pointed and the tip will easily break and fly off. Cut on a sheet of glass or piece of tile. Cut in a rocking motion like a paper trimmer.
Clean up the nubs with a fine emory board/sanding stick.
Measure and make your bends off the model. Commerical bending tools are not a necessity. Make square bends between a pair of opposed razor blades. Hold the piece down with a blade over the top of the rail. Slip another blade under the rail until the blades face each other. Bend by raising the under blade to the desired angle. Round bends can be made using a wooden dowel or drill bit shank.
Apply a pin point amount of white glue at each end of the rail run and at 1/4 to 1/2 intervals. Use white glue to allow for positioning before cementing the rail finally in place. White glue can be cleaned up with water. Not so with superglue.
After the white glue has dried, go back and apply a bead of superglue along the bottom rail (the gutter rail).
Touch up any paint nicks & cracks
Shoot a coat of clear flat over the whole model to kill the shine of the glue.