Bring Shine to Car Paint Job?

My boyfriend has recently bought a new car, they guy he bought it from had it recently sprayed orange but only half the car's paint is shiny. The other half is dull and felt rough which is apparently because he used the wrong sandpaper to buff it. We therefore polished it up with Autoglym and a handheld buffer,... show more My boyfriend has recently bought a new car, they guy he bought it from had it recently sprayed orange but only half the car's paint is shiny. The other half is dull and felt rough which is apparently because he used the wrong sandpaper to buff it. We therefore polished it up with Autoglym and a handheld buffer, the results were great. Once it came time to wash the car the polish seems to have washed off, it still feels smooth but a dull look. Will we have to buff the car after every wash or is there a more permanent way of keeping the shine. As my boyfriend likes to keep his car in top condition and i cant go through buffering every other wkend. Thanks!
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