The paint seems to look a tad grainy on the sides? I think it may have dried too fast or something. Slowly building up several thin coats would give you a much smoother and nicer looking finish. Don't try to cover the model at once in one thick be-all-end-all paint coat. Just slowly build it up, let it dry and cure for a day or so and do another coat, etc. etc. until you've achieved the desired result.
To be quite honest (and just to make sure this is not to knock your builds or anything
) I think your builds would benefit greatly from slowing down a bit. Hammering out a kit a day or so just seems rather quick to me. I've spotted a few parts on the 109 that didn't line up too well. The lower part of the wing for example seems to protrude from underneath the upper part, some dry-fitting and probably some trimming of the parts could have prevented that, or atleast remove the biggest part of the problem with the remaing ill-fit being solved by a little filler or maybe some superglue and some sanding. Some minor filling and sanding here and there (along the wingroots for example) could have improved the overall result as well.
These things take time, it's true, but believe me the results will improve greatly if a little more attention would be paid to certain areas. I wanna bet even these aging FROG kits could be build into real eye-catchers given a little extra time and effort (I think this especially goes for a lot of these older kits, they need care and attention to make it work) No Tamigawa to speak of back in those days.
Once again, this is not to knock your builds, but rather advice regarding the possibilities to improve the results. Ofcourse there's the forum, so should you run into some kind of trouble, drop a line a see what fellow builders have to say about it. I bet a solution can be found to tackle whatever it is you come across. There's loads of knowledge, tips and tricks available all over, so why not use it