working with bondo/filler

[dryvr12]

So I smoothed out the dried bondo, but it still needs to be sanded down a good bit. I hit it with some 220Grit. What should I use to avoid scratching the resin but get the extra filler off?

[MikeMc]

listen to Mark...I would add to stick with sanding sticks...easier to block out and square things up.....I use Black, Grey, and Pink grits....(100,180,220) or close

[Harry P.]

There's no way you can sand down the filler without "scratching" the rest of the body. In fact, you have to hit the rest of the body because you have to feather the filled area into the surrounding surface. Just do what Mark said, take your time, and use a light coat of primer every so often to check your progress. You'll get there eventually.

[bill w]

When you get close to the resin switch to a finer sand paper, if you scratch the resin its ok, try to only sand the filler at first using 320 grit then 400, 600, 800,

When you prime the part and you can still see a difference between resin and filler sand a little more with 800 grit. I always wet sand, it keeps the paper from clogging,

the sand paper lasts longer, and you get a smoother finish. It also sands faster.

Bill

[bill w]

I also use sanding blocks, I make three kinds, hard plastic, semi hard rubber, and cork. The plastic is for flat surfaces, the rubber for curves and such,

and the cork for finishing.

Bill

[philo426]

When I use Bondo spot putty ! wet sand it with 320 grit.Really works well!

[Steven Zimmerman]

The only thing I would add,is-make sure you sand the body BEFORE you apply the bondo or filler,for maximum adherence. I usually use 320 grit wet or dry,or hit it with a sanding stick.NOTHING worse then to have putty 'pull up' when you're in the finishing stage of a model.BTW,some auto fillers are formulated to be applied OVER primer,for best adhesion........'Z'

[dryvr12]

Thanks for the insight and helpfulness! I plan on finishing sanding this weekend. Ill post pics on the workbench when its primed. (the hearse, that is)

Edited June 12, 2010 by dryvr12

[Steven Zimmerman]

Um.......HUH ?Yu asked for advice;you GOT advice. (and GOOD advice at that !)I read nothing in the posts replying to your query that could be construed as negative....Did I miss something here?