I like the plastic Fltk theme quite much (shiny eye candy

) and thus have added this line to my .Xdefault:
fltk*scheme: plastic
This works well for most GUIs, however I have noticed some of the small fltk GUI programs still don't appear with the theme I have chosen.
I have traced the issue back to the code of some the small GUIs where the theme is hard-coded as follow:
Fl::scheme("gtk+");
Could it be possible to remove those explicit theme settings in order not to override the user's settings?