Sure, all you need to do is scuff it with a gray scuff pad and reshoot the color and clear. If you find that the clear is thin (it may be, being the base was shot thin) then be careful and don't shoot the color or clear too wet. In other words be sure that the metal is not cold, don't use too "cold" of a reducer, don't apply it too wet, all the things you need to keep the paint flashing relatively quick. If you don't do this the solvents in the paint or clear that you are applying can get thru and under the thin clear that you have applied and lift it.
By the way, don't feel bad. Painting something like that frame is taxing even for a seasoned pro. To get in and out of all the nooks and crannies and get all the sides and what not, it is pretty tough so don't beat your self up.
One thing you may want to think about is to turn it over now and shoot the bottom from the top. If you think about it, THAT is how it is going to be seen. When it is under the car, all that you are looking at now will never be seen again! So if you turn the frame over and paint it real nice, even if the top side has some dry spots, it will never be seen. But painting the what WILL be seen will be much easier and you can really make it look nice.