False nails and nail polish

With reference to Question 1480 dated 20/07/2008, Mufti Saheb advised that a woman is allowed to apply false nails and wear nail polish. False nails are usually stuck onto the nails of your hand and nail polish is painted over the nails. Both the false nails and nail polish are usually non-porous and do not allow water to pass through. Please advise with regards to the validity of wudhu and salaat whilst these false nails are attached or nail polish is applied.