
9610 Commonwealth Ave., Jacksonville, FL 32220
Biscuit
BOAT:
Biscuit, a 1974 Cape Dory Typhoon
Project Detail:
Timeline:
Mid-October through TBD
Project Scope: Bottom job (stripped, barrier coat, and new antifoul), hull and deck paint, structural repairs, new brightwork fabrication, assembly and varnishing, mast and boom paint, new deck hardware, more tbd.

Project Hours:
Final Interior Sanding | Port Side Thru Hull Removal (11-2-24)
Nov 2, 2024
The turn in the weather in Florida opened up the motivation to crawl into Tyvek and a full-face respirator to tackle the interior surface prep. The recent weekend was the third round of interior work, and now represents ~99% of that work completed. There are a few areas (tight inside corners) that require some additional hand work, but the work is essentially in the bag!
For this third round, again I worked with a smaller 5" DA sander which assisted me getting into the less roomier areas of the interior, using 60 and 80-grit disks. The overhead had been completed in the first two rounds of work, so today I focused on the v-berth hull, v-berth platform, cabin sole, and quarter berth spaces. The surfaces worked in this session were all part of a molded interior, with a gelcoat finished surface. The plan is to simply rough up this gelcoat surface, create a tooth for the paint to grab onto, and finish with an interior paint. With a 6'2" frame and low overhead of the Typhoon cabin, the maneuvering was at times acrobatic and in part interpretive dance, but I slowly managed my way from bow to the aft portions of the port and starboard quarter berths.
There are a few areas where this molded interior has been damaged through what appears to be compression, but also areas purposefully cut out. The owner and I will contemplate what may be necessary to repair for mostly aesthetic reasons, so more to come on these areas of the interior. The sanding was roughly two-thirds of the day's work, and felt good to put nearly all of that sanding work in the rearview mirror.
After cleaning up the interior with a good vacuum session, I turned my attention to the last remaining thru-hull. This thru-hull was located on the port side, just outboard where the head was located. Based upon the size of the thru-hull, it appears to most likely be a discharge thru-hull. It consisted of a bronze mushroom type thru-hull, a wood backing plate and a Marelon seacock. This hull penetration would be eliminated, so I worked towards removal and closing it in with a new fiberglass layup. With an oscillating tool, I made a series of cuts on the exterior of the thru-hull fitting, and then individually pried the pieces up until they broke off as tabs. With all of the "tabs" removed, I hammered the remaining portion of the thru-hull up and into the boat's interior. Since the hull thickness in this location was roughly 1/4" thick, the taper needed to be 3" to achieve the 12:1 ratio required. The 3" taper would translate to a 6" diameter that would need to be ground, and this was done with an angle grinder and a 40-grit flap disk.
I then cleaned the surfaces (interior and exterior), and began to prepare for the new glass layup. A piece of clear plastic taped to the hull would provide easy work in tracing for the 3 layers of 1708 biaxial cloth. I drew in a few arrows to retain proper orientation, and then took the template into the shop to remove them from fresh biaxial cloth. With the three layers prepped, I began mixing epoxy to wet the surface of the hull and to saturate the layers of biaxial. The layers of cloth wet out, I placed them in their proper orientation, removed trapped air, and then finished of the surface with a layer of fairing compound (thickened epoxy with 406 colloidal silica and 407 low-density fairing compound). I placed a piece of peel ply on to reduce surface prep upon my return.
Total Hrs: 8









