1. A way to camouflage RFtools blocks, most specifically the Elevator.
2. Allow screens to be placed flat on top/bottom of blocks.

Bringing this suggestion back if its ever becomes possible, that would be amazing for the elevator blocks especially, and perhaps add a door control that would only open the doors if the elevator is at the current floor, I think I can manage to do a system for this right now if the elevator block output a redstone signal when its at a floor, I have to fiddle out a bit with this right now.

The elevator does output a redstone signal when it is at a floor. That's what the red arrow is for at the back

Good, will have to find a way to get the door system now that I know I can count on a redstone signal. I found a nice sliding door from Malisis doors that should fit nicely. What is the maximum size of the elevator, can I do a 4x4 or its 3x3 limited platform size.

The elevator does output a redstone signal when it is at a floor. That's what the red arrow is for at the back

Wish I'd known that a few days ago. I just set up a system using a Sensor to detect the elevator platform being present. 🤦‍♂️ (Works well, and I can even hide it behind a wall on most floors due to the sensor's 3-block mode. Though it doesn't work on some floors due to layout, and this would let me fix that.)

I'm using a Shield for the door, although currently in 1.10 this doesn't support using another block texture yet, which would be nice.

1. Doing that in general is not very easy. I could do it for some specific blocks though like the elevator.
2. yes that would be nice but slightly complicated atm. It is on my todo however

Could just use the same method you use to paint blocks from the shield.

Yes but that's possible because those shield blocks are made for that. All other blocks are not and that's not very easy