I wont be smoking any of the flower, i will extract bho from the flower i have sprayed once i get the seeds out
have you done this before? I assume you haven't as you're planning to BHO the flower you spray.
I can advise you on how to go about this as I have done a lot of it, breeding my own auto strains etc.
First thing I would advise is make your own colloidal silver, thats easy you just need a battery, two wires and something made of silver. anything made of silver is fine I've even used an old ring. It doesn't have to be .999 fine grade silver like people say, I've used .999 and I've used the cheapest stirling silver and it makes no difference.
Just spray one lower branch on the strongest girl scout you have, don't spray the whole plant there is no need to do that, that would be like putting a thumb tack in with a sledge hammer. Also by spraying one branch on the strongest plant you will get seeds from the strongest plant. Isolate the other girl scouts and grow them for sensi. You will get probably over 1000 seeds from the strongest girl scout. When you breed autos it's best to pick the strongest plant and just use that, it makes the strain you create stronger over time.
Also be aware that the resulting seeds will be an odd mix of the strains that make up the strains you cross, not just a copy or mix of the parents. I've created 4 of my own strains and it takes about 3 generations of selective pollination to get them stable, and even after that you sometimes get different phenotypes.
Also anything you spray will be totally unusable for anything. you may think you can use it for BHO now but in another 4 weeks time you're going to be looking at this horrid looking mess of male flowers and pollen and changing your mind. Don't even think about blowing butane through it and smoking the product, silver particles will be in the wax.
You can run the flower you get the seeds out of for BHO, but NOT the flower you spray.
Cheers
TGS