I have built this Jar using Plaster:-
And i paint it with plastic white paint as a base >> then apply this gold metallic paint.. now i want to paint some horizontal brown lines using oil-based brown paint and a small brush.. But need some idea and help on how i can get a perfect horizontal line/s? I think it will be hard to do so using painting tape (by tapping 2 parallel horizontal lines using painting tape and keep like 10 cm between them, then paint the area between the 2 tapes ), as it will be hard to maintain equal space between the 2 parallel tapes + i will have a risk of removing or damages the gold paint after removing the tape.. so is there another idea to do so? and are there any online stencils that i can order which can help me in doing what i need?