surfboard style glassing

Yeah, alot of RC airplane/rocket/boat/ect. modelers use this too, keeping excessive resin to a minimum for weight reduction.  I used to do it for all my FG fabrications, found the process a waste of time actually.  I do however use a roller when I using FG just keep out the air bubbles during layup, which IMO is a must because alot of customer's requests have been overkill.  I dont want MY work to fall apart.  Answer (my 2cents): I used to use that process, now I cover everthing liberally and just use a roller, alot of resin is not a bad thing as long as there are no air pockets/bubbles.  If you need to fabricate thin, single layer, not so rigid components such as tweeter pods on an A pillar, sure, keep it thin and simple in places where no loads are exerted. 

Anyone else with other opinions or experiences?

Heres something to think about when using a roller.  Lets say, you have a section of something covered with foil/tape (im sure you know the begining process), and you brush down a decent layer of resin, then (if the plot is flat) lay a sheet of woven FG down, (if the plot is very curvy, use ripped up pieces of FG mat).  After the sheet or mat is layed down on the resin, use the roller to press the FG down into the resin which ends up the the desired result that you already know.  This keeps the roller out of resin as much as possible.  After that is simi-cured, you can start this all over and over until the disired thickness.  I guess if you plan this right, it will help save on resin.  Maybe you already knew this, just thought I would explain.  Being you want flat wave free surfaces, do remember that when you have a flat surface that needs to be created, you should use MDF instead.  Use FG to fabricate, make contoured pieces, or recreate whats already existing, ect.

Most of my sanding has only been because I needed to scuff the surface before applying body filler or RageGold.  As far as using a surfboard process....I dont think I would be so detailed, because we are not trying to create a surfboard, except as stated before, when making small A-pillar pods or something that dont need so much support.  ADD kicked in tell me if I talked too much. LOL