Here you will see where one of the big mushrooms fell back onto the artwork and left its imprint on its spores.

Sadly, I decided this large piece - A3 - was ruined.  

My point being, be very careful if you decide to reframe your MushroomArt.

As with any natural art work media eg watercolours, pastels or charcoal, follow some simple guidelines and your mushroom art will bring you many years of pleasure.