Bummer about the glue but all is not lost

Be careful sanding that cap, I'd be be tempted to do a solid colour in acrylic paint on back & sides and work it in on the top as a burst.

Spraygun or rattle can for the back & sides and airbrush on the top.

There are plenty of vids on YT showing how to do it, just have a practice on some scrap timber first to get the technique right