Remove paint on intake manifold

Hi, I have an edelbrock performer intake that was painted blue and black over the blue, I tried paint stripper and it took off the black but wouldn't do anything to the blue, someone said not to sandblast it,anyone have any ideas?
Thanks

Why do you want to strip it? Are you wanting to go back to "raw" aluminum? I suggest paint or powder coat that takes on the appearance of raw cast. The coating will help keep it clean looking