Explain the project a bit more.
I’ve used a 2-part acrylic, or was is silicone…? Made by SmoothOn. It was at least 3 or 4 years ago, my memory is a bit hazy. I believe it had the name Crystal in the product name.
It had a translucent look to it, mainly crystal clear, with a small hint of cool grey.
Take a look on the SmoothOn website or local distributor.