Alright, call me stupid but Ive forgotten, denatured or isopropyl?

Either will work with no real appreciable difference.  One note of caution, though.  Denatured aclohol has a bit more bite over time and can actually mar model styrene if left on for long periods or if the plastic is wiped repeatedly with it.  So for general pre-paint cleaning, I would recommend Isopropyl.

i use isopropyl for cleaning all my stuff after sanding ,so it should also work for the small parts

i also use isopropyl as a decal solvent ,because micro sol and micro set are not availible to me