Disolving foam

Allan Farr

This morning I noticed that my header tank fuel gauge (transparent tube) had been leaking (very slightly). Unfortunately there was a small damp spot on the top (rear) of the GU canard. My canard is painted with some sort of green paint. I have done a preliminary "tap" test and noticed that all along the top rear 2" (approx) of the canard centre section it sounds "different" (not hollow) than when I tap further forward. Is that normal or is it possible some of the foam has dissolved?
Slightly worried,

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