You really don’t need to remove decals if they are under the ramp, as most are. But if they are on top, and the ball rolls over them, Absolutely definitely 100% remove decals (I assume that’s what you mean by graphics?), as they will melt into the ramp when you try to polish.

Flame polishing needs to move quickly on the top, where the balls roll on, and not heat up the plastic very much at all. If it’s getting even -warm- you may be overdoing it. So the (underneath) decals will be fine.

I also flame polish my plastics sometimes - you should Practice on a junk piece of ramp or a
Plastic to get the hang of it.

What’s the best torch to use ?

I use a small butane torch. Easy to hold onto and move around quickly. You want one with an adjustable flame dial (most do) but you want it to get pretty low. I bought a second torch as a backup and the flame is too high at the lowest setting; so I don't use that one.

I’ve used an inexpensive little creme brule torch in the past. Tiny, light, worked well.

Hank did an awesome tutorial on flame polishing.

OMG, I forgot about Hank. Is he still around?

Hank is pretty funny...I bet he's fun to hang out with. But for real now, is there a thread or video of someone flame polishing with great sucess? I've been searching the forum for a how to.