At first I was using pink bricklayers string, attached to a loose screw in either end of the batten and pulled tight over the metal sheet, to make my screw lines.
But the movement of the string and the few mm it floats of the sheet means you end up with slightly wavey lines.
In the end I changed over to a chalk line and found the results very satisfactory
At first I was using pink bricklayers string, attached to a loose screw in either end of the batten and pulled tight over the metal sheet, to make my screw lines.
But the movement of the string and the few mm it floats of the sheet means you end up with slightly wavey lines.
In the end I changed over to a chalk line and found the results very satisfactory
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