We have navy sunbrella over the rails that we grab to go down the companionway 
hatch.  When we first get to the boat on a weekend in bright daylight sun and 
uncover the rails, they are indeed very hot.  However, within a few minutes of 
uncovering them, the heat dissipates to the outside air temperature.
I have often wondered what it is about the dark sunbrella that makes the 
stainless get so hot.

Bruce Whitmore
1994 C&C 37/40+ "Astralis"Madeira Beach, FL 
(847) 404-5092 (mobile)
bwhitm...@sbcglobal.net
 

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