Polishing Engine How's it Done!?

Hi I've got a 92 KZP with dull cases, covers, etc. I see these awsome shiny new looking engines on bikes posted on here. I have tried engine degreasers, Aluminum polishes, wet sanding... and have not gotten my engine half as shiny as most of the kowis posted. Alright... who has the secret! Thanks for helping me out!!

P.S. You guys have helped me a few times with my Kowi. My bike is tired but has gotten alot better since i bought it. Thank you so much for all your help!