Looking to see if 3 or 4 coats of polyurethane will give protection.
Can you poly over vinyl.
Take your plaque outside and spray the entire thing including around the edges.
So to keep this nice for years and years to come grab some polyurethane spray.
One note over time poly will turn a amber color was not a problem over dark color but over light color will be.
Mod podge is also non toxic and generally safe to use with older kids.
You should have no trouble in doing that as long as you use a water based polyurethane.
We have used mod podge not modge podge as i know lots of us call it successfully for a lot of our projects including sealing over vinyl making custom photo canvases and glittering pretty things.
When it has dried feel around the edges of the vinyl.
You may be right in.
Even if you use premium outdoor vinyl or permanent vinyl that vinyl will fall off eventually and start curling up either in icy cold temperatures or in the heat and so on.
A show car or custom chopper and you ve did some testing and you can t easily or cost effectively do it with only paint or vinyl graphics.
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Polyurethane over vinyl decals can i do it.
I ve seen many with custom motorcycles attempt a clear coat over top of the vinyl decals and with excellent success.
Use smooth brush strokes and then leave it to dry.
I used to have old wood floor that was painted with gloss brown paint when it would get dull i would go over it with polyurethane it would be glossey again for a couple more years i would think it would be the same for your vinyl.
Carefully brush the polyurethane over the vinyl.
Can you put poly over vinyl flooring.
Oil based poly would damage the vinyl decal as would any kind of solvent based coating.