Quickie Q2 Lite Construction Manual - page 252
.....
Prior to mounting the engine permanently to the airframe, it is
necessary to shield the firewall with fiberfrax and aluminum sheet.
.....
One layer of fiberfrax must shield all exposed plywood,
including the inside of the magneto/starter box. To protect the
fiberfrax from abrasion due to normal wear and tear, a thin sheet of
aluminum is fastened over the fiberfrax. However, the aluminum sheet
does not need to be placed over the fiberfrax protecting the
magneto/starter box; you may choose to use 2 layers of fiberfrax
wherever a sheet of aluminum is not used.
.....
The fiberfrax may be held in position with epoxy. It is fragile,
so be careful not to destroy it in handling. To attach the aluminum
to the firewall, use a few BSP46 rivets located not closer than 2" to
the outboard edge of the firewall. (The cowling flanges will be
mounted there later.)
PAGE 16-1
Q2 Plans - Chapter 16 - Page 16-02