We have a thread going on that stuff geoff on another forum. Some guys have tried it. Its made by smooth-on. It is basically just a clear brush on epoxy. Its not some special wonder coating that makes you part look like a sheet of glass or anything like that. It takes multiple coats to fill layer marks then to get the glassy smooth look you sand it and put on another coat. I know you paint all your parts so you would be far better off putting on a few heavy coats of primer, sanding that then painting your usual way. Primer will always sand and build up way better than epoxy