I really would like to know where this Anavar/Winstrol fat burning myth comes from? To be fair, the original poster hasn't been the first to raise this topic. Both compounds defiantly have hardening properties, but this tends to be most prominent when the user already has a lean physic. Both compounds tend to have to be run at a fairly high dose too. I guess the boost in metabolism and the fact that you'd probably be pushing yourself harder during training may help to burn fat; although to treat them as a "fat burner" is complete spunkadoodle!
Before you can understand why Trenbolone works the way it does, you first need to understand that you have two types of fat, or adipose tissue, in your body. First, you have visceral adipose tissue, which surrounds your organs and has very little effect on your overall appearance. Second, you have subcutaneous adipose tissue, which rests just below the skin and has a tremendous impact on your appearance. As Trenbolone binds to androgen receptors (which it does very well), it inhibits lipid uptake. This means that your body cannot continue to add to its subcutaneous fat stores. As such, when you work out, you burn away the subcutaneous adipose tissue and obtain the “cut” appearance. This is why Tren is widely regarded as the best steroid to lose weight.