It is a little tricky to work with and I may have actually found it easier to follow my cunning plan all along but I have 200gm cloth and 100gm cloth on my Shae greave forms and have had my vital loading dose of anti-histamines to go trowel on some filler today. It might require me being a bit more careful with proportions as I want to do one leg at a time and avoid issues of congealing before it gets to the card.
I am at a stage where I can get photos though XD So I'll bring my camera and post to my scrapbook folder here

Oh, and Ados epoxy with a little West Systems fairing powder will set up in the presence of a heater very quickly indeed......