I use Z10 on interior leather and vinyl. I DO NOT use anything on the top of the dash except a water dampen rag. For vinyl cleaning I just use a diluted APC (i.e. Sonus All-In-ONE). Never had any problems with UV damage (i.e. 11 y.o Lexus LS400 (sold) that was never garaged).
In the 70's and 80's I did use the old AA type products as a dash dressing without problems except hazing of windshield from out-gassing of the product.
Z10 has excellent UV protectants. If these UV agents are good enough that I trust their ability to protect my leather, they are definitely good enough to protect vinyl. :hifive: