Yes. When your paint has cured, sand one last time with very high grit sandpaper. Make sure all excess is off, I use a tack cloth. Then this is the product I use when I want extra shine for my painted cabinets: https://www.rustoleum.com/product-catalog/consumer-brands/zinsser/interior-wood-finishes/bulls-eye-shellac I really enjoy using this product. If you are new to shellac, practice on something else till you get a feel for how to lay it down. Also, use a black bristle brush, I prefer Purdy Brushes. You will need a good brush for this.

Thank you @LynchPainting. The door is actually metal not wood, does that make a difference in your recommendation?

Yes