O.K.....my simple opinion. Although a wee bit on the expensive side of the tracks, it is simply a 'blood hound' for all of your cracks, seams, sanding lines, gaps, blemishes, air bubble craters, mould lines, flash ridges, left-over raised detail lines, putty ridges, wee-waa's, Klingon Death Sticks, Rom......wait a minute, got a little off-track there for a sec...........you get the idea. :-)
Good stuff.
Tread.
Oh, also. The Mr. Surfacer 500 in a jar is superb for brush application to an individual crack, seam, sanding line, gap,............................................... #:-)
very good for fill in small gaps, and such. Awesome stuff.
). What it says in actuality is "...receive from...", not "...supply to...". It's just a reversal of tense's or something like that. 
