Dust........

Ok guys.... I have a 73 Scamp. I live on 1/2 mile of gravel...... Lets just say some days I can hardly breath if I drive over 5mph... she fills with dust!!!!

Is there a common problem to fix (seals)? Will I need to spray line the whole undercarriage? Just seeing if anyone else out there has this dilemma...

P.s. car has 96k and is fairly rusty for now.... Thanks!