You will need:
A base (tin can, flat frame, foam wreath, etc.)
White spray paint
Attach shells with glue, let dry, and then bring outside to give a few coats of white spray paint. Here's a step-by-step from the Camp Tinker archives: click here.
Here's a mirror from IKEA given the seashell pasta treatment.
This project was meant to be in my second book Seaside Tinkered Treasures but didn't make the trek to the UK in one piece despite two shipping attempts! Use the same application of shell pasta and glue and white spray paint on a styrofoam wreath form.
Happy tinkering + please stay safe at home + well!
*Looking for copies of my books? Please consider first checking your local independent bookstore or try Barnes & Noble before buying from a big retailer like Amazon. Shop small, buy local.