Been there, done that. Use 600 wet or dry with your hand and water to
knock down the orange peel and a more aggressive (200, 400) to flatten
runs and drips don't try to get it completly flat, leave some shine
between the bumps (use a flat sanding block on the sags and runs and
take your time). Follow with machine rubbing compound and machine
polishing compound using a wool buffer (rent a good polishing machine).
Points to remember: stay well away from edges and raised details
(finish by hand) or you will go right through the paint instantly, and
in the unlikely event the car has a clearcoat you will have to remove it
completly with wet or dry before buffing. Paint must be thick enough to
withstand this aggressive treatment, so you might want to be prepared to
continue with a full paint prep and have it repainted in case you go
through the paint right away. Generally, orange peeled paint has been
applied fairly heavily. This is a time consuming process-don't rush it
and you should be pleased with the results. Good luck!
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