I had the same problem on my 69 2a, It had Hammerite, Red Oxide primer and blue over spray on them, Peeled off the thickest parts, Chucked them in a bucket of hot water to soften paint up and got all the thick off and then let them dry and just over sprayed them with a black aerosol.. And they look like new for 20 minutes work. But if your taking them off you might aswell re-fit new..
Depends on if your on a budget I suppose..