We recommend that you cover the entire mug and not just the decal because you will see some little brushstrokes.
Clear coat over vinyl graphics.
They can really stand out if only on the vinyl but it looks like it was meant to be that way if you cover the whole mug.
Clear coat and acrylic type paints could and likely will disturb and smear most printed graphics.
Graphics will be easier to remove from a clear coated surface.
In all instances i had the company that does the vinyl graphics on our company vehicles supply and cut the vinyl.
To seal vinyl decals on mugs simply cover the entire mug with some dishwasher safe mod podge.
Spray one coat onto your vinyl.
Today we use paint systems and they depend on the substrate layers for proper adhesion and binding of the layers to complete the system.
I have attached a picture of a table i did several years ago for a 60.
I used an automotive acrylic urethane as my topcoat.
Hold the can six to eight inches from the surface and use thin coats so the paint doesn t run.
Spray two to three coats of clearcoat paint over the area that has been scuffed including the vinyl graphics waiting five minutes between each coat.
Clear coat over vinyl decal advice on how to apply and coat a decal on a wood table top.
And likely it will only work well with die cut style vinyl decals not printed ones.
The clear coat that should have been installed over the base color will bind to the base color and create a uniformly hardened paint surface.
Add one light coat of clear automotive urethane to the decal.
Wait another 10 minutes.
Why clear coat over these jeep decals.
Then apply a second light coat.
Allow that layer to dry completely before applying a second or third coat.
If you do decide to go with a clear coat we highly recommend testing the results on a separate piece of your vinyl wrap.
Wait four hours after the last coat is sprayed before handling the area.