Hey guys. I just recently got back into the sport and pulled my os fs-70s out of the shed. It was out there for about 9 years with no rust protection oil in it. I took the valve cover and rear crank cover off. Intake valve was stuck open and there was rust on the crank and rear bearing. I soaked it in wd-40 for a day and got everything loosened up. The engine turns over very smooth and has good compression. Now I'm worried about the rust. The actual balls in the bearing look like new and I dont hear any unusual noise when I turn it over. What should I do? Thanks.