SFG grid - Electrical pull "string"?

For those not familiar with it Electrical "string" is, in fact, actually polyester tape with foot markings.  While most string is cotton, I'm sure that it comes in other materials.  For example the tennis racquet string that I have is nylon and it's strength exceeds that of 300# test fishing line.  I doubt it will rot in the life of a typical SFG and I suspect that the same is true of polyester electrical pull tape which is easier to work with than tennis racquet "string".  It's only a guess, but I would bet that the electrical pull string would last as long as typical clothesline.  Mind you, I'm not recommending that you use it only clarifying its durability.  I intend to use 12 & 14 Ga. insulated copper wire, only because I have several thousand feet on spools that I have no other good use for.  I would prefer lath strips but they aren't long enough.  I could splice them but that's a PITA!  The wire should prove to be durable enough although some insulations are UV sensitive.  We'll see.

I found white nylon clothes line to be most effective for me.
I wanted movement in my grids and be returned to exact spacing as before.
Nylon stayed clean, was not affected by suns rays, and it was neat.
Bricks maintained tension. I was waiting for window weights to replace the bricks..