I Need Help!!!!!!

I'm not having issues with getting into the car. I did that right when I got it. I cant get the doors open. Due to a lot of rust and corrosion on the locking mechanism and the latch. I've been coating it all with PB blaster for a few weeks. Still no luck getting them to open. I just went and coated them again and I'll go out in a little while and try again. If I cant get anything to happen I'll try and take some pictures of what I'm dealing with. Thanks.