Hi , I make heart sculptures in fired clay and polymer clay including for jewellery. I am interested in creating clear resin versions with the addition of glitters and possibly pigments. Looking at the products available I guess I will need to make a silicon mould first and then use a clear resin product. My sculptures can be as large as around 11cm wide by 7cm deep and maybe larger. All pieces are fired and baked. I have also considered perhaps making wax versions if necessary for casting. I have looked at the videos for making a mould and using resin which are helpful and read the forum and see that there is a new product out soon that does not go yellow over time. I would welcome advice on the following:

1) Which resin and silicon mould products would be the most compatible and easy to use for a beginner to create nice clear glass like and shiny pieces with no stickiness?

2)  Will I be able to cast the larger pieces in one go  or will I have to do it in stages so it will set in the middle?

3) The sculptures have rounded bottoms so how best can I structure the mould to allow for this? Will I have to pour into the bottom of the shape so that it extends out a bit then sand and polish? How much space do I need around the piece in the mould?

If you have any other useful tips that would be great!
I look forward to advice and getting started!
Many thanks