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trying to make my quarter panel round ?

blazer 2010

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I ve patched my quarter panel on a 67 belverdere but one section came out a little flat on quarter panel and I,m trying to build it up with body filler to get my curve but I end sanding it away or I can,t get the filler where I want.It,s not too much for filler but it not right.Any suggestions on how I should spread the filler as in vertical or horizontal .I,m kinda lost on so many curves on this thing
curve.jpg
curve.jpg
 
Body filler is used as a skim coat to finalize metalwork, not to "build up" to make a body contour. You must metalwork to make your contour.
 
Still working away on it! I would get or make a long sanding board that covers what your trying to shape. You can buy sandpaper on a roll and make the board as long as you have too. Cut down 1x4 or even 2x4 will do. If you need help just pm me.
Harv
 
Still working away on it! I would get or make a long sanding board that covers what your trying to shape. You can buy sandpaper on a roll and make the board as long as you have too. Cut down 1x4 or even 2x4 will do. If you need help just pm me.
Harv

The above is what I do - I go to Lowes or Home Depot, pick up a level in tools, go to lumber and find the straightest, flat piece of 1 x 4 or 2 x 2 hard Oak or Poplar I can find according to the level, for cutting a sanding board out of. I put the level back on the shelf in tools. Cut the board to the length you feel comfortable with, attach adhesive back sandpaper from a roll to it and you can sand anything flat. For something like that area of a Belvedere fender, I would skim coat the area, applying it from top to bottom. Sand with the board and 80 grit moving at a 45 deg angle from bottom to top and alternate and sand at 45 deg in the opposite direction. That will keep you straight fore and aft but allow you to build in the vertical curve and match adjacent surfaces. A light dust with guide coat should show up any low areas that need another skim coat of filler. But you do have to be careful to avoid going to thick with the filler.
 
Not a body guy but you might try making a template or contour gage from some wood. Find a good area, scribe the wood for your cut(s). Use it to work the metal just below.
 
The above is what I do - I go to Lowes or Home Depot, pick up a level in tools, go to lumber and find the straightest, flat piece of 1 x 4 or 2 x 2 hard Oak or Poplar I can find according to the level, for cutting a sanding board out of. I put the level back on the shelf in tools. Cut the board to the length you feel comfortable with, attach adhesive back sandpaper from a roll to it and you can sand anything flat. For something like that area of a Belvedere fender, I would skim coat the area, applying it from top to bottom. Sand with the board and 80 grit moving at a 45 deg angle from bottom to top and alternate and sand at 45 deg in the opposite direction. That will keep you straight fore and aft but allow you to build in the vertical curve and match adjacent surfaces. A light dust with guide coat should show up any low areas that need another skim coat of filler. But you do have to be careful to avoid going to thick with the filler.
If you're going to do it, this is the way. The idea is to use the "good" sections of 1/4 on either side of your repair to level the filler to mimic the height and curve. Depending on how big your patch is, that gas cap might give you trouble.
 
I should have mentioned finding a good, adjustable profile gage. They are very useful. Also flooding the surface with water after sanding and sighting down the side can usually show up waves and irregularities. And if you do enough of this you will get to the point you can merely slide your palm along the surface and feel irregularities and waves.
 
Thanks for the replys.I.m not adding much filler but is a section about a foot long that looks flatter.Can really notice it with a straight edge even thou I know the quarters are not straight but I can tell from the other side about where to be. This the mess,not turning out too bad for a first try thou.

patch job 2.JPG patch job 1.JPG
 
make sure you have no "high" metal .......... tap down the high spots or you will pull your hair out
 
That's a nice rebuild job there. I would use fiberglass type of bondo for what you are doing . There are several brands but not sure what is available in your area. Bladecutter has a thread here about mixing Your own and it works I've used it on my build. Maybe someone can post a link to it. Good luck with your project.
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A lot of different replies from rip it out and start over to how to block sand it out. Maybe it would help to clarify what you are dealing with it you lay a long piece of straight wood or pipe down the side and measure the largest gap that will have to be filled with filler.
 
It,s not too bad now.I was trying to build up the hump in the center but what I needed was to define the curves at the bottom and the top of the center hump and now it looks like it taking shape.Now I just have to find a piece of pvc pipe that size and should be good.

draw.jpg
 
Good call on the PVC pipe. I've found that good sanding blocks and forms can be fashioned out of many unsuspecting items and materials.
 
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