tips for spraying primer

I would by at least a gallon. Spray a few coats on with a 1.8mm or 2.0mm tip.
Block it with a long hard block and some 180 grit.

Run a tape line down the body lines and block to it, Then switch the tape line over to the other side of the body line and block up to it. This will keep you from hitting the body lines so they come out nice and sharp. If you have a hard time seeing the body lines you can draw them on with a long straight edge and pencil.Then when you8 done blocking scuff the lines with a red scotch brite. That will take the pencil off and knock a bit of the sharpness off the edge.

If it still needs a bit work after the 180 you can re prime and re block with 180 a second time. If its looking good re rime block with 320, then 600 wet.

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