So you do one coat of primer? Then do a few coats of the satin black? Do you have to wait for each coat to dry before putting on the next one? (Sorry, never done this before! Lol)
Do about 3 very thin coats of primer until its fully covered leaving around 10 -15 mins in between coats, i use a hair dryer to speed the process up abit
Then about 3 - 4 coats of satin black, do the 1st coat very thin, when you are spraying dont get too close and move swiftly accross, dont hold it in one position at all or it will run, you need to keep it moving at all times in quick little blasts.
Again leave about 15 mins in between each coat or again you can speed it up using a hair dryer, if you do, dont hold it in one place for too long as the paint might blister.
Leave overnight then re fit, job done.
Im no painter but ive done quite alot in the past and this technique works well for me, just take your time and dont rush