Happy painting!

You could tape off and use something inexpensive like vapor barrier to help with overspray but totally understand your concerns. Brush on paint should work just as well – you might want to try using a small, foam roller for smooth results. I’d also recommend multiple thin coats. You won’t get as smooth a result, but because you’re not looking up close at soffit/fasica anyway, I doubt you’ll notice!

It has not peeled or chipped at all. I believe because it’s sheltered and no water/snow sits on it, it has held up perfectly. I did take time to do the prep outlined in the post, which is important – it needs to be clean and dry for paint to adhered well. But it honestly looks brand new and I’d recommend this DIY with confidence, using the paint I used.

Thank you! I am so happy with how the garage is turning out – it’s getting me even more anxious for the house reno haha.