Thanks for your reply John.
I always want to seal the decals under a shiny clearcoat. I know the bikes are not that shiny and mostly the decals are placed after paint. Maybe it's not as realistic as it should be but I don't mind about that.
The gold wheels are now clearcoated but I don't like the result for this bike. So I'm gonna add another layer of that gold and leave it like that. It's the closest goldish color I have so I have to deal with it.
Kris.