The ornamental design for a thin renovationceilingtilecover for a blemished existing flat 2′×4′ ceilingtile, as shown and described.
FIG. 1 is an upward perspective view showing my new design for a thin renovation ceiling tile cover for a blemished existing flat 2′×4′ ceiling tile;
FIG. 2 is a bottom plan view;
FIG. 3 is a front side elevational view which is a mirror image of the rear elevational view;
FIG. 4 is a top plan view;
FIG. 5 is a left side elevational view which is a mirror image of the right side elevational view; and,
FIG. 6 is a broken away cross sectional view.
The broken line drawings of the prior blemished existing flat 2′×4′ ceiling tile and support grid are for illustrative purposes only and form no part of the claimed design.