Mike johnson wrote: >Hey, >One thing that works very well with finish work is to make a series of light >hash >marks with a pencil. > Yes, it will work. but it will be difficult to asses how thick is the layer of the filler. the method described with dark primer under a coat of filler will tell you exactly how far you are from the surface. If someone doesn't feel comfortable with primer between composite surface and filler there is another method. Simply use toothed trowel to apply the filler. (Like the one used for gluing the tiles in the bathroom.) Advantages: 1. you will apply even layer of filler over entire wing. Thickness will be limited to the depth of the cut between teeth. 2. strips of filler are easier to sand ( you are sanding only half of what you would normally sand) 3. surface is visible between the strips all the time during sanding . 4. you will fill only once more (between the strips) with straight edge trowel. 5. sand lightly entire thing and you are done.
GeorgeM Westbury NY