joint compound

I am a member of team of students doing a project for my university that involves research for a company. We are trying to understand certain needs of painters. Any feedback on the following 5 questions would be greatly appreciated and may help provide you with better products. The following...

Used this for the first time myself and so far I like it. A little heavy when working with it - seems like it will be great for small patches. I had to replace a couple of full sheets and fix the rest of the joints on a large garage wall and was wondering about thinning it to make it a little...