The point you make about Johan sounds interesting, is it as simple of all the sources to figure out what tools they have and see if anything can be made into a complete kit? With the prices of Johan kits those might turn a profit if released right.
It should be ok
It should be ok but I have no power slide experience yet, just received a shipment from Mike's Decals. Maybe seal the base decals with clear first? That's what I would do if it were me.
A candle free's up your other hand as well. Another trick I will use is to thin the back side of the panel and then it takes very little heat to get the effect.