The ornamental design for a frameassembly for a paint bucket insert, as shown and described.
FIG. 1 is an upper, perspective view of the frame assembly for a paint bucket insert and a wire mesh paint containment area surrounded by the frame assembly being shown in phantom;
FIG. 2 is a front elevational view of the frame assembly of FIG. 1;
FIG. 3 is a side elevational view of the frame assembly of FIG. 1;
FIG. 4 is a top plan view of the frame assembly of FIG. 1; and,
FIG. 5 is a bottom plan view of the frame assembly of FIG. 1.
The broken line showing of wire mesh in FIG. 1 is included for the purpose of illustrating and forms no part of the claimed design.