this work on slush:
Zardoz NOTwax - Advanced Base Treatments
other than that.. riding with 60+ is closer to swimming :-) you will have 2 good hours of snow at best. then it's soup.
2015/16 -9- Kirkwood days
Arbor A-Frame 158 2009-10
Jeremy Jones Hovercraft 156, 2011/12
Subaru WRX 06