All I got was a lot of theoretical stuff about how "maybe, possibly, perhaps, 
I should try wood sealants.  (Hey, where's Mike Edison when I need him?)  So 
I waded through a lot of crapola on the web.  The opinions were:

1.  Forget it.  Nothing works.  Nothing.
2.  Petroleum Jelly.  Put it on with your finger.  (That Pet Jell might burst 
into flame never got mentioned).
3.  The following:  Pumpkin Preserver


Pumpkin Preserver, a new product, is an all natural pumpkin preservative. 
This non-toxtic product preserves carved pumpkins making them more attractive 
and less messy to keep. Pumpkin Preserver is a low cost, environmentally 
friendly product that easily impedes the deterioration of jack-o’-lanterns by 
deterring mold, rot and bugs.  Pumpkin Preserver contains all natural 
ingredients and comes in a convenient spray bottle for easy application. A 4 
ounce spray-bottle of Pumpkin Preserver costs only $4 (which includes S&H). 

To order:   Send check or money order payable to:
Pumpkin Preserver
Dept. HO
17224 82nd road north.
Loxahatchee, Fl. 33470

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Sign me,  What Did They Through Off the Loxahatchee Bridge, and Was it Rotten?