I've cleared 2 of my machines: Banzai Run and Lightning. Before that, I used mylar to protect my playfields. But I'm never going back to that. I think a good clearcoat makes any game play awesome. Yes, even an EM.

For me, the key to a great playing clearcoat is to use the right stuff. The harder the clearcoat used and the better you polish it, the less grip the ball has. That's why I use a 2k clearcoat with a little bit of elasticity. The elasticity makes the ball grip perfect to me. If used on an EM or early solid state, just polish it less or even give it a final wet sanding with some high grit sanding paper.

I've used this stuff on my machines: www.amazon.de/gp/aw/d/B00KXNAQTY/ref=mp_s_a_1_22