Stretch marks

Hello all,
I am currently on a journey to lose a total of 70-75 pounds and I am 5.1. I have two questions for you all if you don't mind,

1. Will my stretch marks lighted up/ go away or will I be stuck with them?

2. I planned on weight training about 30-35 pounds in. My question is this, if I get to 110 but I pack on muscle to get me to 120-125 will my body look fit or bulky.

Thank you for your reposes in advance! :)

Replies