I got some MDF boards cut and installed them in my kitchen. I used an MDF primer and painted them. I’m really happy with how they look however, I made a huge mistake in not painting the wall first and in certain lights, you can see between the very small gaps (the paint behind it was a light blue). I have tried a very fine paintbrush but it won’t work. Would a spray gun get between the gaps if I where to respray the whole thing? Seems a bit drastic but I know it’s going to bug the hell out of me! Thanks in advance!