can i buy a green spray to cover brown patches on my lawn?

My lawn has several brown patches due to my dog urinating on the lawn.
can i buy a green spray to cover these patches

Answers:
try this stuff its temporary, spray-applied marking paint for turf sport pitches, golf courses and athletic fields. Harmless to grass, plants and trees. Non water soluable when dry. Light reflective pigments suppress grass growth. many colours including greens If you were a flower what kind would you be and why?

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