Once you start using Swix Glide Wax Cleaner you will never hot scrape a ski again.
I've been using it for several years now and can tell you it works better than anything.
It is not a wax remover. Not only does it clean the bases, but it also conditions them for better wax absorption and adhesion.
It is the only product that cleans of fluoro's from the base too. This is important as after lots of fluoro's are used the base looses it's ability to absorb wax.
Fast skis are needed for terrain park skiing too. Unless you like to case the jumps hard. In that case slow skis are awesome.