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Once in place, burnish this down, especially at the edges, with a finger nail, or a fine, blunt edge, to ensure it is stuck fully all round, and pressed into any recesses. When happy, seal the edges of the tape with the colour being masked - for example, if masking over white, then paint white over the edges. Let this dry thoroughly, and it will prevent bleeding of the next colour under the tape.
Actually, Prem, yours looks spot on!