How to Apply True 5200 Bottom

Vintage Boat Preservation How-To

Don Danenberg is a champion of the True 5200 Bottom, which he has memorialized in several books, but also an excellent and seminal article, “What is a True 5200 Bottom?,” Classic Boating, September / October 2014 (click here to view the article).

This section’s content offers a visual and written textbook aimed at answering Danenberg’s question.

Remove Bottom Section

1956 chris craft capri bottom stripping

1956 Chris Craft Capri Bottom & Stripping

Our 1956 19-ft. Chris-Craft Capri has had a tough life, what with being assaulted by inept and worse “restorers” a ...
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1938 chris craft runabout bottom fasteners

How To Remove Bottom Fasteners in a True 5200 Bottom – 1938 19′ Chris Craft Custom Runabout

That Flyin’ By’s bottom was original to the boat is absolutely certain. How do we know for sure? After stripping ...
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1938 chris craft runabout countersinks fasteners

How to Open Countersinks and Remove Fasteners from the bottom of a 1938 19’ Chris-Craft Custom Runabout

We clean fastener countersinks using a Blair Equipment 11090N Rotabroach Cutter Kit, which is available from Amazon.com (https://www.amazon.com/Blair-Equipmen...)Yes, even if ...
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1953 shepherd sportsman removing bottom plank fasteners 112015

1953 Shepherd Sportsman Removing Bottom Plank Fasteners

There is no glory in removing fasteners from the bottom of my 1953 Shepherd Sportsman. It is all about being ...
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1959 Chris Craft Sportsman Porcupined

1959 Chris Craft Sportsman Porcupined

Yes, it is Memorial Day, but we have a boat needing a new bottom, so have dropped all else to ...
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Install Plywood Interior Skin

1946 chris craft brightside 5200 bottom patterning

1946 Chris Craft Brightside U22 5200 Bottom Patterning

OK, we’ve received a myriad of questions about how, once the hull is ready, we ...
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1953 shepherd sportsman 110s fabricating bottom skin

1953 22′ Shepherd Sportsman Fabricating Her Bottom Skin

Our goal, fabricating a true 5200 bottom on Shirley’s and my 1953 22’ Shepherd Sportsman, ...
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1946 chris craft U22 5200 bottom launch

1946 Chris Craft U22 5200 Bottom Assembly is Launched!

Let the True 5200 Bottom assembly begin! It has been a long winter, but, finally, ...
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1938 chris craft runabout inner plywood skin

How to Install the Inner Plywood Skin in a True 5200 Bottom – 1938 19′ Chris Craft Custom Runabout

Actually installing Flyin’ By’s True 5200 bottom begins today. After cutting and fitting all of ...
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1946 chris craft brightside u22 plywood inner bottom skin

1946 Chris Craft Brightside U22 Plywood Inner Bottom Skin Milestone!

Not much to say, or that I can say, other than, “Her bottom is skinned!” ...
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Install Diagonal Planked Inner Skin

1940 chris craft barrelback 5200 bottom

1940 Chris Craft Barrelback 5200 Bottom Planking

Priscilla, our 1940 17-foot Barrelback became our lab rat today as we tested what we ...
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1940 chris craft barrelback bottom planking

1940 17 Chris Craft Barrelback 5200 Bottom Planking Update

Priscilla, our 1940 17-foot Barrelback “lab rat” experiment is progressing rapidly now that we finally ...
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Install Bottom Planks

1938 chris craft runabout install bottom planks

How to Install Bottom Planks in a True 5200 Bottom – 1938 19′ Chris Craft Custom Runabout

Installing the bottom planks can be tedious and is fraught with all manner of challenges ...
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1946 chris craft u22 plank bedded in 5200

1946 Chris Craft Brightside U22: How to Plank Bedded in 5200

Bedding the bottom planking in a 1/8” thick layer of 3M5200 without making a huge ...
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1946 chris craft u22 bottom planking

1946 Chris Craft Mahogany U22 Bottom Planking Fabrication

Our 1946 Chris-Craft Mahogany (Brightside) U22 project enters the bottom planking fabrication stage today.We will ...
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1959 Chris Craft fabricating 5200 bottom

1959 Chris Craft: How to Install Bottom Planking When Fabricating a 5200 Bottom

I have had several requests for a video showing our crew installing the bottom planks ...
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1953 shepherd sportsman how much 3M True 5200 bottom

1953 Shepherd Sportsman: How much 3M 5200 is enough when doing a True 5200 bottom?

One more milestone is disappearing in the rear view mirror. My ’53 22’ Shepherd’s port-side ...
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1938 chris craft runabout bottom battens

How to Install Bottom Battens in a True 5200 Bottom – 1938 19′ Chris-Craft Custom Runabout

As is typical of all Chris-Craft utilities and runabouts, this 1938 19’ Chris-Craft Custom Runabout, ...
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Pre-Soaking, Priming & Painting the Bottom

1948 truscotts barrelback runabout 5200 bottom

1948 Truscott Barrelback Runabout True 5200 Bottom

Our 1948 Truscott Barrelback Runabout has almost blasted through her True 5200 Bottom milestone! Her ...
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1948 truscott barrelback-runabout danenberg pre-soaking experiment

1948 Truscott Barrelback Runabout Danenberg Pre-Soaking Experiment

The extensive write-up accompanying our July 8, 2022, update on my pair of 1948 Truscotts ...
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1948 truscott barrelback runabout-danenberg pre-soaking results

1948 Truscott Barrelback Runabout Danenberg Pre-Soaking Results

Our 1948 19.5-foot Truscott barrelback deluxe runabout survived Don Danenberg’s “Pre-Soaking” step in the process ...
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1930 Dodge Runabout True 3M 5200 Bottom

1930 Dodge Runabout Barriercoating the True 3M5200 Bottom

Our “True 5200 Bottom” project on the 1930 Dodge Runabout, the Minnow, has reached the ...
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1940 chris craft barrelback 5200 bottom

1940 Chris Craft Barrelback True 5200 Bottom Milestone

Priscilla, our 1940 seventeen-foot Chris-Craft Runabout has blasted through her True 5200 Bottom milestone! After ...
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1953 shepherd sportsman 110s 5200 true bottom update

1953 Shepherd Model 110 S Sportsman True 5200 Bottom Update

The July 9 ACBS show in Gravenhurst, Ontario is racing at us. We are committed ...
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1946 chris craft brightside u22 how to paint bottom

1946 Chris Craft Brightside U22: How to Paint Bottom

Paint! I could claim that it seems like only yesterday when we launched the preservation ...
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1946 chris craft brightside u22 bottom painting

1946 Chris Craft Brightside U22 Bottom Paint!

Since the last update video, we have applied five coats of Interlux 2000E two-part primer, ...
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1956 Chris Craft Sportsman 5200 Bottom

1956 Chris Craft Sportsman 5200 Bottom

We are just two coats of Pettit Old Salem Copper Bronze Hard Racing Enamel away ...
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1948 Truscott Barrelback Runabout True 5200 Bottom Update

1948 Truscott Barrelback Runabout True 5200 Bottom Update

Our 1948 20’ Truscott Barrelback Runabout “graduated” from Danenberg pre-soaking with flying colors. We, well, ...
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Excerpted from “What is a True 5200 Bottom?,” Classic Boating, September / October 2014:

Danenberg_True_5200_bottom