Do you have lots of bits of this and that in your fiber stash? Why not make marled yarn!
I came across a few articles and a video for reference for you to get started.
Here’s an article on marling yarns on I found by Jillian Moreno posted on the Knitty Blog, March 15, 2011.
From December 2019, spinoffmagazine.com posted an article on Drumcarder & Diz: Creating a Marled Roving, written by Emily Wolscheid.
For those that love alpaca & llama, I found a Creating Marled Yarn pdf from The Rocky Mountain Llama and Alpaca Association, published Winter 2018.
Not many videos available on YouTube, though I did find this one:
There is always carding and combing to blend those bits of fiber together. No matter how you spin, use it up!