At Kurt's prompting... in my experience gold is a hard color to paint. The paint options tend to be thick and hard to control - especially when it comes to limiting the application to the high spots as you see on the real ship. You could give it a go but be prepared to wash it off
. For what its worth - yellow makes a fine substitute for gold at this scale.
With all that said I would be prepared to use a different approach entirely:
Option 1: given the small size of the part and the nature of the micro-details I would first paint the whole thing gold (or yellow) using a thinned down paint and many coats so you don't lose all the details. I would then use a black wash and flood that into the recesses leaving the yellow/gold on the raised up portions (this is called lowlighting). Again, it will take several layers of the wash to fill in things back to black. If you were very careful...when the black wash was nearly dry - you also might be able to wipe off the highlights further revealing the yellow/gold.
Option 2: dry brushing is a technique you could research on the internet. It basically employs a nearly dry brush to tease color onto the raised portions. I think this approach is excellent when working on exposed highlights (on convex surfaces, for example), but holds less promise for the 3D entryway you are trying to detail.
For example: the lion and the dog are lowlighted:
And the scales:
And here the lion's main has been highlighted via dry brushing:
YOU GOT THIS!