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).
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 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.
Yes. Because a chemical bond is no longer possible because the epoxy coating has dried, a mechanical bond is required. This merely means that the cured epoxy must be lightly sanded before applying the next layer: the first coat should have a matt, nearly white finish.
Yes, it can.
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).
No, there is nothing for the Epoxy to bond to. The latex is creating a "bond breaker." You will need to use a water based or water born sealer with at least 20% solid acrylic. DO NOT USE solvent based sealers over latex. It will wrinkle the latex.
First you must pressure wash as best as possible. Next you need to acid wash the concrete. Finally you should be able to neutralize the acid with a vinegar and water solution. Let dry. You should prepare the whole floor this way.
Sure but hit it with 400 grit as the paint needs something to stick to
I wouldn't. I would try to get the first one to cure somehow, possibly by warming that area.