Quoted from Durzel:
Is changing the disc the only solution to black crud being left everywhere?
Looking back through my photos I took the ramps off my Tron (LE) back in August 2018. Nearly a year later and I have another black streak around the back, despite the fact the game barely gets played. I also cleaned and waxed the playfield yesterday and the cloth I used ended up with a black film over most of it. None of my other pins have this problem.
I have a clear disc that I bought a while back that I can fit, but I'm scared to because of stories of violent ejections. I have several mods that are expensive or irreplaceable.
This is what it looked like last year, I'd say it's fairly similar now...
Short answer is: clear disc, as well as replacing rubber rings/posts with Titan Silicone rings.
Don't be afraid of the clear disc, it calms down to a nice level of havoc within 30-40 plays. I can't now imagine mine without it, as the effect it has on the ball is incredible. I have had it shoot the ball out with such spin to make the Quorra shot, the Gem shot, even the left ramp...which has only happened once and blew my mind!! I love it!!!