Maybe a couple of coats of slightly thinned clear nail polish?

That's the hay loft. Probably more so on older barns, but that's where the term is from.

You could always write yourself a simple bash clean-up script that kicks off the uninstall and also deleted the profile and anything else you want gone. Not a universal solution, but if you need to do that one thing often enough it would do the trick.

You're probably gonna have to experiment a bit. For baking and more delicate things probably the listed fan temp, but for things like roasted potatoes it doesn't matter as much.