^ I sanded a whole frame the other day. It took a couple of hours, mostly, b/c I got some cheap sandpaper to start. The 3M 320 grit paper worked faster and obviously left a better surface than the cheap 220 grit. The 3M paper also lasted longer. I'd get 3 sheets of 3M 220 and 3 sheets of 3M 320 (it's labled for between coats). It shouldn't take too long. I also got a respirator, on the off chance that the paint had lead in it, and just to save my lungs. The corners are the hardest part, but they are probably hard w/ stripper too.
But, it seems like you are trying to leave the chrome. I saw some sites about that. Google bike restoration, and you will likely find some tips about that. The rattle can paint should come off easier than the original, so the right strength stripper may be able to uncover the original paint.