So we all know W210 cars have rust issues. When's the last time you thought you got all of the rust off by sanding & grinding, only to find a few months later the fresh paint touchup bubbling again?
I dug up my old chemistry books and wiki, and put my brain cells rather than my arm muscle cells to work. Phosphoric acid is your friend! I diluted some strong phosphoric acid with distilled water down to about 40% concentration and tested it on old rusting steel parts. BOOM about 30 seconds later the rust was gone and all was left was grey phosphate.
Be careful though b/c acids can be dangerous. and immediately following acid treatment, rinse with water, dry, wipe with alcohol to remove traces of moisture, and hit it w/ your fav. primer and basecoat.
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Gone but not forgotten:
2003 Honda S2000
1999 BMW 540i sport
1995 BMW M3
Is the acid the same stuff sold as "rust converter"?
I've been using that stuff for years on my boat trailer and old motorhome.
Rust on Mercedes??? Naaahh.
ProV1x, I used POR15 Starter kit to fix rust issues on my car. Primer and touchup paint I bought in PaintScratch Their paint color was much perfectly. Clear coat was made by Wurth.
After “Metal Ready”. Rust has been transferred to something black (I guess it is carbon base cover)
Sealed with POR15
When I removed back door paned then I found some technical “bug”. MB uses stainless still bolts with aluminum nuts. As a fact I had to stubbed some pairs)
[img]http://mysite.verizon.net/igor_aleshin/images/RustFix/RustyBolt.jpg[img]
Bansai, great job, I was wondering, did you do the paint job out side, or did you do it in a shop and if out side how was the drying time, polish etc....I am just wondering about the paint, and clear coat application.
Thanks!
I did everything myself… on parking lot… Right weather is biggest issue for such of job. It is why I did it almost two months.
Temperature was always 70F+, humidity was less then 45% - this is very important.
Drying time:
Cleaned with POR15 Marine clean - 20 mins,
Prepared with POR15 Metal Ready - 20 mins.
I applied 3 layers POR15 - waited 24 hours for each layer .
Lightly sanded with sandpaper#320 before applying primer
3 layers Primer - 20 mins between layers. I used quick drying spray.
First Base coat was applied on next day.
3 layers based coat - 20 mins between layers.
After 1 hour applied first top clear coat layer.
20..30 mins between layers.
I didn’t touch painted area about 3 days.
After that sanded with water (sandpaper #1500 + #2000) – removed overspray issues and finally polished with rubbing compound.
do tell us if the rust comes back. in my experience if there's a tiny rust spec remaining, it'll come back. even after treating with that POR stuff. that's why bodyshops prefer sandblasting over chemical treatments. goodluck!
After that sanded with water (sandpaper #1500 + #2000) – removed overspray issues and finally polished with rubbing compound. good job, I am actualy going to wet sand my head lights #1000 then 2000. I plan on wet sanding my entire car in a couple of weeks, but I wanted to touch up some parts in the future and the job you did proves one doesnt always need to go for the entire paint job. But if it looks like I am do for an entire paint job I may go that rout. but your method looks like it will be a great experience. I am gonna refer to this thread In a couple of weeks for paint touch up. Thank you.
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