I don't normally thin epoxy unless I'm injecting it with a syringe or really need it to soak into a porous material, but I never did a side-by-side comparison of thinned vs. un-thinned epoxy. This test answered some of my own questions, and hopefully some of yours as well.

West System Epoxy: https://amzn.to/2XGeeKL

You can also find me on:
Instagram:   / thesnekkershow  
Etsy: https://thesnekkershow.etsy.com (woodworking stuff)
Etsy: https://generalvarietyvault.etsy.com (non-woodworking stuff)
Ko-fi: https://ko-fi.com/thesnekkershow
Printables: https://www.printables.com/@SnekkerSh...
And even here:    / @relaxing-naptime-music  

This video is not sponsored. I paid for everything and used my own time. As an Amazon Associate, I may earn a small commission if you use the Amazon links to make a purchase.