Sub Articulo 43.0

 Sorry you're having problems with FoilTeX and PDF.  I (think I) would
 be surprised that the root cause is "the font manipulation done by
 FoilTeX" because the essense of this is scaling of standard
 fonts. There is nothing really fancy about it, particularly once you
 get to dvi.  I've never tried using dvips to get to pdf so I can't
 say if that's the problem.
 
 On the other hand, I just tried a simple test of 
   pdflatex sampfoil
 (with a modified version of sampfoil.tex, adding pdfoutput=1, e.g.)
 and the results were essentially OK.  At least AcroRead had no problem
 with it.
 Have you tried this?