This goes to show how important tests are and knowing your material. Sometimes it happens we ruin our hard work in a simple mistake. While I had experience with both materials and have combined them before I have not worked with resin in such quantities. A part of me suspected something like this could happen. I should have listened to my instincts but I have far too much relied on the small samples I did.
The clay reacted to the heat of the resin curing and bubbles all over :O now she looks like she's in a jacuzzi.
Lesson learned :O
Of course my fault so compensation will be made :)