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Old 08-11-2009, 03:33 AM   #1
moogles
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DIY Rust fix

As many of you know, i've been looking to fix the rust on my car...

http://www.maxbimmer.com/forums/showthread.php?t=122452
http://www.maxbimmer.com/forums/showthread.php?t=123098


So finally... i've completed my DIY rust fix...

It was easy, but tideous and took a long time... Just remember that this was all done at home and it's not the greatest job in the world. But, it'll last and satisfy me.


Procedure:
1) Identify the rust spots.
2) Punch or sand the rust spots with 80grit teeth papers. I kept sanding until the surface is smooth, and the rust is gone.
3) BONDO. If needed, piece of metal body patch.
4) Sand the dried bondo to the shape of the car.
5) Repeat steps 3~4.
6) Tape off the repaired spots.
7) Spray paint the colour, dry, clear coat.
8) Identify small chip areas that rust. Touch up brush paint.




Before pix:

passenger side fender (punched and sanded)


passenger side fender, body patched and bondo'ed... repeated like 5 times...



the trunk (not punched or sanded... yes this is how i bought the car)


the trunk (sanded and a little bondo)


the trunk (metal body patch... the trunk seal was bondo'ed too later)


passenger side door bottom (sanded)


driver side bottom, along the driver side rear bottom (sanded and bondo)


passenger side rear fender (punched and sanded)


passenger side rear, below the tail light
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Old 08-11-2009, 03:34 AM   #2
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After pix:

passenger side fenter




the trunk


passenger side door bottom



passenger side rear fender...





I didn't take pix of all the spots after.. it looks pretty much the same... you still see the lumps... but i was just getting tired of sanding everyday.... haha
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Old 08-11-2009, 03:35 AM   #3
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oh and the trunk lid was just as bad... i just bought a "new-used" trunk lid and changed it...

thanks to Tom from Highline motors for the trunk lid and advice!!!
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Old 08-11-2009, 03:40 AM   #4
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i went through 2 tubes of bondo, 2 "universal black" spray paint, 2 sheets of 80grit sand paper, 2 sheets of metal body patch, 1 stick of brush touch-up paint, half can of clear coat...

prolly cost around $60~70. I found out later i could've bought some stuff from the dollar store.... haha
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Old 08-11-2009, 03:41 AM   #5
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I didn't show all the rust spots becuase the pix get repeatative... but you get the idea... and the trunk, the black paint has some spots because the spray paint was running low and it starting spitting...
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Old 08-11-2009, 03:42 AM   #6
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the swirl marks that the rust made was easily wiped off using a polish... i sued the "nu-finish scratch doctor"

which by the way, works well on hazy plastic headlights...
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Old 08-11-2009, 03:52 AM   #7
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Not too bad at all for DIY. Use a little more clear, then wet sand and polish. Should look a lot closer to your factory paint.

Looks better than rust!
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Old 08-11-2009, 07:05 AM   #8
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Definitely better than rust for sure, but as mentioned above needs wet sand and polish to try and eliminate the the rough transitions from the taped off sections.
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Old 08-11-2009, 07:45 AM   #9
dannyb
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I used trim paint to fix the rust on a black e36. Wet sand it and polish, this will take time if you want it perfect but it will look like new after.
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Old 08-11-2009, 08:11 AM   #10
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next time clean as much rust as possible and apply rust paint and then use spot putty on top of it and then another coat of rust paint to seal it - it will last longer than bondo over rust
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Old 08-11-2009, 10:29 AM   #11
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very good effort.. good job
save some money too..
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Old 08-11-2009, 10:34 AM   #12
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I wonder do all E36 have rust under that trunk lid?
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Old 08-11-2009, 11:09 AM   #13
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I wonder do all E36 have rust under that trunk lid?
Probably 98% of them.
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Old 08-11-2009, 11:37 AM   #14
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Quote:
Originally Posted by R_JAY View Post
Probably 98% of them.
i say probably 100% of them...
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Old 08-11-2009, 11:37 AM   #15
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when you guys say wet sand... you mean on top of what i have now? at the areas of transition from the taped off part? with a finer teeth count sandpaper and water?
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