When the hull is sanded and filled to your satisfaction the exterior should be fiberglassed for maximum durability. Dumas has recommend l ½ to 2-oz. fiberglass cloth for this instead of the ¾ oz. cloth normally used for model aircraft. The ¾ oz. cloth is harder to work with and adds very little impact resistance to the hull. An alternative method of finishing the hull for those who don't like fiberglassing, is the good old-fashioned silk or heavy silkspan and dope.

  I used Hobbico Fiberglass Cloth Medium 2 oz. for this.  This cloth is easy to use and found in most hobby stores.

NOTE: You should plan ahead for the fiberglass process.  What I mean is, don't do any sanding or cleaning just before or after you lay down the fiberglass.  The resin seems to attract every floating goober or lint in the air.  Allow the hull to dry in a clean room.  The picture shows the fiberglass cloth cut and placed on in hull. 

  Use a tack cloth and wipe down the hull.  You need to clean the hull and remove any dust.  Look over the hull again for any areas that need filling.  Fill, sand and re-clean as necessary. Before you start, also make sure your work table is free from dust and clean.  I use plastic over my building board to protect it from the resin.

  First I cut the fiberglass cloth into a piece that covers the hull from the stern to just ahead of where the sheer knuckle starts. Make sure that the cloth is larger than the area you need to cover.  It should hang down past the decking, this will be sanded off later in construction. I worked from the stern to the bow.  Saving the curves of the bow for last.