I am trying to make a preservation cast for a special orchid blooming in my yard, the original I made burned the flower and it turned ugly and black. The second one I did, I painted the flower using acrylics and then made the cast. It was drowned by bubbles. It isn’t visible now. I had to wait some years now and the flowers are blooming again. I want to see if drying them in silica will help keep the color from turning black or having to paint the flower. I have a heat gun now. I am wondering what resin will help to not burn the flower, be bubble free and non-yellowing? I saw that “low heat” curing can help. What resin will get the job done? The jewelry one might be too small for the spherical mold. I am wondering also if I need to coat the flower first with a thin coat of low heat cure resin and then use more in the sphere later? Thanks for the feedback!