Washing the model
So hmmm why Should I wash the model I just got done scraping sanding the thing? Mold release and the oils from your fingers are all over the model you have worked so hard to make look so good why cut this corner now? I know some of you might say I have never had a problem before for.
For me all it takes is one time I that I do not do this step and all my hard work looks like crap be cause the primer didn’t adherer just right.I take all my stuff to the was bin. Use warm soapy water and scrub them with with a soft bush I use a nail brush.(tooth brush is ok)
Then I rinse them off in clean running water and let them dry toughly. You can try to speed this up if you want I put them in layers of paper towels to draw off the water pat them dry but will let them sit for some time and check for any water left on them before I start painting.
Priming
What brand you use?What Brand of Primer you use isn’t as important as technique and what type of tip you use. I was taught in auto body class to start spraying off and stop spraying off of the object you are painting. Keep each pass the same distance from start to finish no mater the distance you spray from be it 1” to 1’ as long as it is the same from the start, also do not swing your arm as this will cause your arm to move in a arc and feather your edges which will cause a uneven coat of paint this will really show up on tank and any large models. Remember a few light coats is better then one heavy coat of paint.