How do I refurbish an old picture frame?

I am assuming this is a wooden picture frame is that correct?

https://www.marthastewart.com/913077/refurbishing-picture-frames

https://coolmompicks.com/blog/2014/01/24/how-to-refinish-old-picture-frames/

https://ourpastimes.com/how-to-refinish-an-old-wood-picture-frame-12182007.html

I received some FolkArt ultra dye as a gift once. It's an intensely colored stain and I really liked it. It comes in a full pallette of colors that are very vibrant. I think it would work great for an old picture frame

I have restained, and painted my frames and mats. I sanded down ever so lightly and then either applied stain [usually darker] or I sprayed with Rustoleum paint so not to have brush marks. It comes in tons of colors.

Painting works on even vinyl frames. Chalk paint, especially. Small containers of Waverly chalk paint that Walmart sells is great for this.

https://www.hometalk.com/diy/decorate/rooms/make-a-picture-and-frame-look-old-35331613?expand_all_questions=1

Good ideas here:

https://coolmompicks.com/blog/2014/01/24/how-to-refinish-old-picture-frames/

Here is one way: https://happydealhappyday.com/distressing-wood/

You could paint them in bright colors with chalk paint. You could also hot glue embellishments (like small wood shapes, etc.) on them with hot glue.

Here's a really cute idea: https://www.hometalk.com/diy/decorate/rooms/repurposed-old-picture-frames-to-serving-trays-6538518

You could screw small hooks into it and lean on the wall and hang necklaces

There are some good ideas here: https://www.thespruce.com/wall-art-hacks-4088827

It depends on the frame and what you intend to do with it. If you want to use it as a frame again, try painting it, spray painting it, using some Rub n' Buff on it. If you want to turn it into another project, Hometalk will have a zillion ideas, just type a few key words into the search bar at the top left.

interested in the pieces if you still have