Anyone use CD tweaks

I was wondering if anyone was up on wether or not Shine-Ola is harmful to polycarbonate? I was told I needed to know this before using it with my cd player. I don't know what polycarbonate is but I know there are people here with a lot of knowledge on this great site. Thanks!

I have just received a John Blue CD mat, which sits on top of the cd, without any preconceived expectations I noticed a signifant improvement, music sounds more distinguised, more detail, voices and wind instruments sound more natural. Overal the music sounds quieter (less background noise) and the music is more coherent, also less sibilance. Slightly better separation, it is as good as an expesive component upgrade in some regards and better because it eliminates the digital harshness of cds. Currently I am listening to Enya Watermark and am thoroughly enjoying the music, first impressions; the sound is more analogue, and more detailed in an unobstrusive way. It cost me US$40.00, and the material is very light, about 3 grams, so it should not affect the motor. I like it so much that I see it as essential to cd player use. Note the cd player sits on thick marble and I use small mahogany pucks, that only touch on the rubber part of my feet, not the aluminium, since that is the only way it is effective in my system.

ditto with the disc damper but I use the Marigo Reference and yes it does make a difference. I also just started to use Ultrabit and for sure it does make an almost jaw dropping difference. It is a bit expensive ($65/bottle) direct from Manufacturer or $80-$85 from Music Direct but you can hear the difference the first time out. Also my CD sits atop Bright Star's Air Mass and Big Rock, again a "tweak" that makes a VERY POSITIVE difference, wouldn't ever be without them!

Update regarding weights on top of CD players and Amp/Preamps....not good, kills dynamics and limits transparency. I still use brass heavyfeet under CD player but not umder my amp/preamp. Mapleshade CD enhancement products work well to reduce digititis and add a bit more warmth and rosin to the music.

I used to have a bottle of Finyl and it worked wonders. I wonder if something similar is available today?

I also have a CD mat (blacklight?) but I am just getting too lazy to use it. I have to soak it under light so that that it glows in green .... ah .. jus too much work.