i.e. make them look like a redstone furnace or sth else

Currently working on a 1.10.2 version, the 1.7.10 version is not being maintained anymore, sorry.
Closing all issues not relevant for the new version.

How about something like the Conduit Facade in EnderIO.
These are pretty nifty and can be anything one wants. If you don't want an extra machine for painting you could use shapeless crafting for example...

It will be more like drawbridges with a slot for the block used as camouflage.

Or like that. Haven't used drawbridges since now so I didn't know they could do that. :)