Here is the "after shot" which shows the cleaned system. I cleaned all the plastics on the SE/30, on the HD20 drive underneath and the IIgs keyboard. The Apple speakers you see were never yellowed. I bought these new in the box on EBAY -- they were never used by the owner and always stored in the box so they never yellowed. The speakers show just how perfect the RetroBright method is. It doesn't turn the plastics white. Instead it restores the plastics to their original platinum appears.
Yes, yes, if you look closely you can see that the front bezel of the SE/30 is not 100% deyellow as the back. But after staring at white cardboard all day outside, my eyes were shot. Another dose of RetroBright and a few hours in the sun would make the front and back sides match perfectly. But that will be for another day. Breaking apart my SE/30 was a chore I don't wish to repeat often!