Touch up painting ?

I have a few scratches on the fairing and was lucky enought to get a set of genuine touch up paints with the purchase. They were old and a little thick so I added some thinners and applied one colour low on the belly. Now even thinned the paint went on in sort of "Blobs" and although the colour is perfect it looks like... well lumpy? I was thinking of using a teeny sanding block/stick and some 600 wet-n-dry to smooth them out but I thought I better check here first to see if anyone has the "technique". I'm gonna wait a few days for the paint to harden in any case.
Any ideas on how to apply this sh*t and how to get a mint finish would be much apreciated by this perfectionist.
Any ideas on how to apply this sh*t and how to get a mint finish would be much apreciated by this perfectionist.
