Thee is no necessity to do that. Any 2 part epoxy is tough enough to withstand anything.
Yes, you can on some one-part epoxies; however, be sure to check the data sheet for the epoxy. Most solvent based epoxies will act as a remover when placed over polyurethane.
The Sharpie will eventually wash off the epoxy. The only way to keep any drawn image on it is to sand it down and do it or possibly draw with your Sharpie and apply a couple coats of epoxy clear coat over it.
If your old epoxy is good then you can apply over it, but there are many facts to consider before applying over existing epoxy coating.
If it has a matte finish it should be easy to paint over.
You can definitely use latex paint over epoxy. In fact, it is recommended to use latex over epoxy by the paint manufacturers, rather than using epoxy over epoxy. The latex adheres better and if you then want to use epoxy next time you paint, you have a nice coat of latex between the layers. If you use epoxy over epoxy, often the paint will just peel off in layers once some time passes (and sometimes right away).
Applying a clear coat over epoxy provides protection against UV rays, scratches, and yellowing, while also enhancing the epoxy's durability and giving it a glossy finish.
Yes, you can stain over epoxy for a seamless finish.
Yes, you can apply polyurethane over epoxy as a protective finish.
Yes, you can apply polyurethane over epoxy for a durable finish.
Yes, you can put polyurethane over epoxy for a durable finish.
Yes, you can use polyurethane over epoxy for a protective finish.
No, it is not recommended to pour epoxy over polyurethane for a smooth and durable finish.
Yes, you can apply polyurethane over epoxy resin as a protective finish.
No, it is not recommended to apply epoxy over polyurethane for a durable and long-lasting finish.
You should apply at least two coats of clear finish over a stain. Be sure to put thin coats of the clear finish on, you do not want it to be too thick.
Yes, you can apply epoxy over stained wood for a durable and glossy finish. Epoxy provides a protective layer that enhances the appearance of the wood and adds durability.
Yes, you can stain over epoxy resin to achieve a different finish. Make sure to properly prepare the surface and choose a stain that is compatible with epoxy resin for best results.