On a recent trip to Mozambique I collected lots of pansy shells (sand
dollars to our American cousins!!).
I want to display them but they are extremely brittle.
I have tried varnish and also resin to harden them.
But both of these substances cause the shell to lose its lovely white colour
and turn an ugly dirty yellow.
Anyone got any ideas on how to strengthen them and yet preserve the colour?
(hope this is not too far off topic)

Ger