Tamiya primer are pretty good.
First, sand down the body with 400 grit sandpapers, to get rid of the shine, then apply a coat or two of primer. Once primer are dry, wet sand it with 1500-2000 grit sandpapers, so that the body is nice and smooth. Then you can spray on the body color, do two mist coats then for the 3rd coat, do a cover coat, after that, add 1-2 cover coats if you think it need to. Once the paint is dry and you are happy with it, then do another wet sand starting with 1500 grit sandpaper then 2000 grit, to get everything smooth, also can help remove the orange peel. Last you can spray on the clear coat.
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