A few metallic brush tips for shiny brush strokes. Edit in Brush Editor.
To use these, upload into your materials, drop them into your brush subtools, and use the brush editor to upload the brush tips under the Brush Tip setting. Brush Stroke is also a useful setting to play with.
If you use the Edit > Tonal Correction >Hue/Saturation/Luminosity, you can easily change the color of your brush strokes using the gold brush tip, gold brush to any other hue and maintain the metallic look. Just be sure to isolate the strokes to their own layer for easy color editing.

Image material
brush
Update history
Update Mar. 4th, 2022: Added an image to demonstrate the brushes.