> Method 3. Strip the entire boat with no glue between the shear strips.
> Sand it. Slip plastic between the deck and hull and glass the deck or hull
> outside while on the forms. Remove it. Then glasss the other half.

The only reason I don't do this all the time is because it is fractionally easier to other part of the boat off while glassing one part than it is to shove the plastic/waxed-paper into the sheer joint. Being basically lazy, I jump on any step that saves me a tiny bit of effort. Of course I open myself up to damaging the un-glassed piece when I remove it from the forms, but aside from the time I stepped on it, I have not had any problem when I put it someplace safe.

I do not recommend stepping on a deck when it does not have glass on it. It will break.

With larger boats like a double, I do the wax paper trick.