Have you tried the new Extreme Sheen paints from Rayher? This is fantastic metallic paints with high gloss. They are fantastic to use for a lot of different projects. Here, I have tested them on an altered lighthouse from a second hand shop.
First, I added washi tape over the windows, to protect these from paint and glue. Then, I added metal, wooden pieces and flowers. The ligh house was then spray painted black and then dry painted with Extreme Sheen paints.
The pink flowers has been fussy cut from the paper: Sainte Maxime - St. Tropez, from Prima.
The boat and the lighthouse in wood is old wooden figures from Kaisercraft. Under the boat, I used micro beads and screws.