The first step was inspecting the frame. 
It looked like it was in a good shape. 
Indeed, 90% of the frame still had the original paint, but behind all the brackets was some surface rust. Nothing really to worry about.

The only PITA-job (pain in the ace-job) was removing the sway bar brackets. The bolts were very bad rusted and didn't had the intension to come out. 
So, time to use the BIG things and getting help of the grinder.

Now it's time for sanding ...