I thought hairless was recessive....
Yea, a hairless x coated will give you coated het for hairless, unless the coated is het for hairless anyways. Then you have the chance of getting hairless and coated.
The amount of fur also depends on which hairless gene your working with, and I dont know that each hairless gene is compatible with eachother. I also dont know which one is the most popular, but I'm guessing the shorn hairless... lol