I have a hard time putting old rusty parts back on this car once I've taken them off. Since I already have the transmission out of the car I figured while it's easy to access them I would replace the motor mounts. Also, instead of an OEM replacement I went with some stiffer competition ones purchased from Flyin' Miata. I linked them below. Once removed I sprayed them some good ol' Rustolium Automotive Grade Gloss Black. I wish I had satin but this works. I just put 3 coats on after sanding them really good. I definitely recommend getting a proper grinder and these pads I found on Amazon: https://www.amazon.com/dp/B09WMDVC11. I used a Milwaukee M12 1/4" Right Angle Die Grinder - 3485-20 to prep for paint.
https://flyinmiata.com/products/mazda-competition-motor-mount