Don -

 

Superfil is *way* easier to sand than micro.  That's because it's *way* softer. 

 

I use Superfil in all areas except those directly in the leading edges (i.e. where raindrops and bugs would impact the aircraft).  In those areas I still use micro.  Also, I will not use Superfil in areas where the thickness would be over, say, 3/16 inch.  But I don't think I have many of those, really.  The thickest areas I have would be near the main landing gear doors.  However, as this is in the propwash, I didn't think a glassy surface was required.  Besides, my Lancair buddies will never know, as the gear doors are always open when parked. 

 

Unless someone blabs...

 

- Rob Wolf