Paint stripper doesnt work...

[Max777]

Ok, so because I'm swapping in another engine, I decided to strip down my nasty grimy engine bay, clean it, and repaint it in 500 degree Hi Temp white.

I was fine on the stripping off all the parts, and got most if not all of the grime out. however, when I went to strip the paint, the paint stripper just isnt working! I did it per instructions, spray on, and let sit for 15~30 min.
Well, this is how it turned out after some scraping, and then another coat a day later and a power wash. (note: I did not wash the old stipper away after the first time, and just sprayed over it the second... would this affect anything?

Here's some pics:






Also, I cleaned up the shortblock I am putting in, and I must say, it looks mighty clean!