So James to understand Composite does get hot to the touch??God it smells awful, especially when hot - like melting plastic. Maybe at some point the off-gassing stops being so bad? But meanwhile you are breathing pollution. My guess is toxic fumes.
I have a small deck but I compensate with a big nail gun.Ipe or cumaru are absolutely great. And it's really fa,r far better to install it with hidden fasteners (same with Trex). Again, if you have a relatively small deck, it would be a good choice. But if you have a biggy, you might need a second mortgage.