Got the first Coat of Primer on there and sanded down a little.
Sanding at this Scale is incredibly difficult. I think I'm going to simply paint it by Hand with a Brush after the next Coat of Primer.
If I use the Testors Paints, I can then spray it with Clear Coat and that with melt the Paint and smooth over the imperfections and Rough Spots. This has worked well for me on two other Models, so I'll do it again.
Only bad thing is that I'm out of Clearcoat, so this will have to wait.
TopRamen: I Really Have to say Hold on there! You will not be very happy with your finished product if you do what was stated above.
Sanding at this size is a bit more of a challenge but is very possible to obtain a babies butt smooth finish by dry sanding your primer with 240 and 360grit sandpapers before rattle can painting this model as you would with any other size.
All those imperfections you speak of will be enhanced and Jump out at this scale by the gloss clear coat not smoothed over.
It's your Rocket so do what you want, but I really strongly suggest spending a little more time on the sanding before trying to paint the model.
My Teeny Triskelion was primed & painted entirely with rattle can spray paints with the exception of the fin spikes which were hand brush painted.
Hope this helps a little