Landing gear crevice trouble...

First of all, let me say that without this forum, I would've kicked this hobby right out the window. I find it that no matter how stupid a question I may have, someone will always give me accurate information. Thank you very mucho.

Now for that stupid question... I painted 2 models aircraft so far completely disregarding the landing gear crevices, with the intent of touching them up with a brush. I've come to realize I'm not too steady with a brush, and no matter what I'll always get even the tinniest of white spots on the fuselage.

I've come to realize that the best way might actually be to address the landing gear crevices first, before the major fuselage painting, and once completed, mask them (with liquid mask)

Is this the most adequate way of doing things, and how many coats of white do you usually have to put on so that it actually looks consistent. (I've been using very little thinned enamels, sometimes not thinned at all, and it seems that the whites just "dissipate" and I'm left with a greyish tone instead of a consistent white)

thank you all in advance.