Here's what some other Hometalkers have done;

https://www.hometalk.com/search/all?filter=repurpose%20silver%20trays

https://www.hometalk.com/search/posts?filter=silver%20trays

Her you go:

https://www.pinterest.es/pin/380624605991529972/?d=t&mt=login

https://www.pinterest.es/pin/130393351685901641/?d=t&mt=login

Hi Joan, there are lots of projects here:

https://www.hometalk.com/search/posts?filter=silver%20tray

Here is a cool idea for Christmas decor:

https://www.hometalk.com/24794873/diy-lamp-christmas-tree

This tiered tray could also be done with silver trays:

https://www.hometalk.com/27428401/thrift-store-tiered-tray

DIY Lamp Christmas Tree

Thrift Store Tiered Tray

You can make them into chalkboards, signs, or an alternative to a wreath.

Here's a post that might interest you - https://redheadcandecorate.com/2014/09/thrift-store-silver-platter-wall/

Hello. I have seen them Upcycled by bloggers with chalk paint.

Here’s a link.

https://www.confessionsofaserialdiyer.com/silver-tray-makeover/

You could hang them on the wall