filler sanding

[bonvo]

What is a good grit to start sanding filler down? any special techniqe used? starting the bodywork on the 610 soon so lookin for info

[steve g]

you want to at least have a D/A sander and a 10" to 16" board and a small block for tight areas. Quick cut it down with 80 grit D/A then block with with 80 but leave some material for blocking level with 120 grit.... deburr with 180 grit and skim it over with 180 D/A for feather edges... use good quality automotive grade sandpaper... the junk at the hardware store is no good... even if it says 3M. Go wint a good quality filler too... i like u-pol Featherweight and u-pol doliphin glaze for finishing touches

[MikeRL411]

Ditto Steve G! The standard Bondo or equivalents are murder to sand, the best thing with them is to use a "Dragon Skin" cheeze cutter while not yet set and roughly shape to contour, then on with the sandpaper or grind wheels. Light weight Bondo is much easier to sand to contour. I don't know if the lightweight is more moisture resistant than standard but get a primer coat on it as soon as possible so that you won't find out the hard way. Good luck, wear a face mask when sanding!

[steve g]

the lightweight fillers absorb moisture easily so primer asap!!!

[Z-train]

 

 

:lol::eek::blink:

[SublimeDatsun610]

Ditto Steve G! The standard Bondo or equivalents are murder to sand, the best thing with them is to use a "Dragon Skin" cheeze cutter while not yet set and roughly shape to contour, then on with the sandpaper or grind wheels. Light weight Bondo is much easier to sand to contour. I don't know if the lightweight is more moisture resistant than standard but get a primer coat on it as soon as possible so that you won't find out the hard way. Good luck, wear a face mask when sanding!

 

+1 what i use when removing the old bondo or excess is a plastic coated wire mesh wheel on my grinder. i could post a pic. it makes a hell of a mess but works wonders.... mask for sure!!! no bondo is not like coke:blink:

[bonvo]

oh i have never left bare filler its always covered with primer and some form of paint the same day i work with it

[Duncan]

Also, keep your sanding block parallel to the surface you are working on and sand in an "X" pattern. If you sand in one direction, the bondo won't come out even, and the finish will be wavy. That applies to all blocks, whether they are big or small. Even the small palm blocks need to be used in that "X" pattern. I would also recommend avoiding as much hand sanding as possible. For curves and radiuses, I will generally wrap sandpaper around different size pieces of heater hose and use that in a "X" pattern, as well...

[steve g]

X pattern is a must, and avoid hand sanding as Duncan said....

[Hyphy]

dont forget, you can always call me up. Ive got all that shit, know how to do it, and where you can get it locally....A word of warning.. the good stuff isnt cheap either. In this weather, you really should do the work indoors.

[zed]

Never sand along a curve - always across it, moving the block with the contour of the curve