Try
as I might to get these calipers painted properly. Always seems to
bubble up in certain areas. I bought an ultrasonic cleaner. I stripped
the paint again and cleaned them up in the ultrasonic then I applied
paint prep liquid (spirit based fast flash off) bought from a specialist
car paint place. Then I did the 3 coats of paint (as per VHT
instructions) and finally baked it in a 200 C oven for 1 hour.
This was the painting part.
Looks quite glossy before curing in the oven.
My painting garage.
After curing.
Bubbles blew up in certain places.
Looks like the lunar surface.
But I have now got my suspicions. These parts where it has bubbled were where there was considerable oxidation. Although I had ultrasonically cleaned the caliper I do believe that this deep seated oxidation was not properly removed. I could still see some discoloration where it was obvious something was going on. I think next time (how many more times do I have to do this?) I will bake them at 200 C after cleaning and before painting. This might removed any moisture that is trapped in the oxidation.
The bugger was that as I got them out the oven with some rubbish oven mits, I burned my hand, let go of the tray and dropped them on the floor. So I am going to have to do them again anyway!
