4R-ALT's livery is plain white, as MAW(if I remember) said.
any idea on UL's next A333(-ALU/ALV)?

Regarding your first question, UL WANTS to optimise the fleet before taking delivery of 4R-ALT, UL doesn't want to blindly take up the order, 4R-ALT might have problems and as such, they are preparing for sudden disruptions if 4R-ALT has problems or if any other planes in the fleet have problems. So they are optimizing the fleet by bringing 4R-ANE,4R-AND and 4R-ANF back in the air.

4R-ALT will be configured with the usual C28Y269 config that is seen on other A330s in the fleet. Don't know about the other A332 due for UL, will be likely to sport something similar to the current A333s in the fleet such as reverse herringbone config, or would be having the C18Y252 seen on 4R-ALH. UL wants to replace their older business class with the newer herringbone config rather than the current ones on the A332s present in the fleet.

4R-ALT is unlikely to get the livery once its due to be taken up, most likely to get the livery here and then will be put onto service. TEV doesn't have painting facilities as you mentioned.

any special livery like OW for ALT, ABS? asking because -ABS is plain white as well and the next jet, 4R-ABT, is in UL c/s

I recently heard TEV do have facility for painting aircraft. Services provided by IAC. I am sorry for the incorrect info last time.