Any opinions on Liquid Tape?

Have been trying to repaint the black insert lines on my 68’ 300 grill. Have tried a liquid tape product called Peel-tek with no success. Doesn't trim worth a darn. Have tried lightly brushing and then heavier. Seems to come off in pieces or in strands. Anybody had any success with this type of product from another brand? Have tried using “flexible” masking tape however it creates other issues. This is what I am working on.

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Author: sprice