Hello,
I recently had both my front and back bumbers repaired because both had alot of deep scratches.  The guy who fixed the scratches did a good job, but when he repainted he used a cheap paint from autozone and it looks terrible!  I want to repaint them with the factory color, so my question is what do I need to do first, sand down the bumbers?  Any help would  be appreciated?

Here are two helpful links:
https://www.paintscratch.com/touch-up-paint-directions/

Please use the link at https://www.paintscratch.com/whatorder.htm as it contains information on what to order for key scratches, rubberized bumpers, clearcoat problems, application notes, etc. After reading this information, let me know if you have additional questions.