Posted for Scott Richardson <scott_m_richardson@yahoo.com>:

Hi folks,

I had a couple questions on epoxies for the group:

o  I have a 235 kit and to date have been building using (originally)
    Safe-T-Poxy then Epolite and lately E-Z-Poxy.  I believe that
    Lancair has now moved to Jeffco 1307.

    -  Is there any problem doing layups with Jeffco over existing
       Safe-T-Poxy/Epolite based glass?
    -  ACS notes that Jeffco is good for layups down to 40 deg F,
       what have been people's experiences with sub 60 deg layups
       with Jeffco?  (With or without a warmer box for the epoxy).

o  I am also looking at constructing an engine plenum for my O-290.
    Initially I was going to do it in aluminum, but am now looking
    at doing it in carbon or E-glass across the top with std
    aluminum baffle plates around the bottoms and sides.

    -  Is one epoxy system (E-Z-Poxy vs Jeffco) better/worse for        the higher operating temps of the engine compartment?
    -  What's the collective wisdom on using carbon fiber vs std
       E-glass for an engine plenum?
    -  For those that have built carbon fiber plenums, have you        seen any corrosion between the aluminum side plates and the
       carbon layups?   And if so, would some sort of gasket (made
       out of the normal silicone baffling material) fix this?

Thanks for the help,

Scott Richardson
LNC2 235/290   90% for a decade