Plan to do it in 2 months working weekends. I wouldn't blast the enginge compartment. The first thing I did was power wash the the hell out of the engine compartment. Get all the grease and oil out. Unbolt whatever needs unbolting and power wash it again. Then gring any rust out of the metal. Sand and strip the paint out to bare metal. Power wash it again then blow out the dirt etc with air. Mask everything off good prime paint and let it dry. My local Napa mixed up single stage paint in a spray bomb for $8 a can minimum 4 cans. That's how i did my dart and I was happy.