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Old 09-11-2010, 09:07 PM   #31
Laurence
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If your panels are peppered with surface rust, wire bush off the loose bits & brush on Jenolite. It's a pink liquid, much like water so it won't leave brush marks, then apply second coat & then wipe it off with a dry cloth. It stabilises the rust & stops it spreading, then you can spray on primer etc. Their phone number is +44 161 935 7490.

If you're welding on new panels like sills etc., you can paint the inside of the panel & any bare metal of the body with a 'weld-thru' primer which won't catch fire when you're welding & it stops the panel rusting on the inside (after the repair is finished). It contains a rust inhibitor. You'll need some cellulose thinners if you want to spray it & you can clean your brushes etc. with it. www.hbbody.com

To prime the outside of the panel ready for painting, (especially new panels)
use Super Etch Primer. It contains a rust inhibitor. It can be sprayed or brushed on. This stuff really does stick the the metal. www.upoxy.com
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Old 11-11-2010, 03:52 AM   #32
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I have used POR 15 on my car and agree that it is worth the money! I have POR patch on several seams on my new floor panels to stop any water/air pockets after I weld. The stuff is strong! It won't scratch with a screwdriver! And don't get it on your skin! It will not come off for a long time! My undercarriage is going to be coated with POR, then seam sealer, then chassis paint and then rubberized undercoating. If money is an issue go to you local paint store and ask them for their advice on a comparable knock off of POR. What ever you do, don't use any product that "turns rust into primer" or is made by duplicolor, rustolium..... The only way to to stop rust is to remove it, clean the area and seal it off from air/water! Cold/hot galv. or oxide treatments are only the first step. In addition, most paints are actually porris except "chassis" paints or POR type paints. Abrassion resistance is also a factor, so don't use "multi purpose" type paints! Lastly, bond is the most important!!! clean your metal, completely sand and check your products to make sure that they will not interact with eachother! Sorry for the rant
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Old 11-11-2010, 10:35 AM   #33
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I like using spencers coatings
Hard as nails, stuff i have painted before has been dragged across a concrete floor, and not even chipped it
http://www.spencercoatings.co.uk/
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Old 11-11-2010, 07:12 PM   #34
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i painted my subframe with some rust paint stuff and then bed lined it, and then i put some high heat paint over that, alittle over done but oh well

well see how it holds up
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Old 11-11-2010, 07:37 PM   #35
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i painted my subframe with some rust paint stuff and then bed lined it, and then i put some high heat paint over that, alittle over done but oh well

well see how it holds up
Thanks joakwin for getting this thread back on the topic of what to use on your subframe, not on the body panels ,floor and everywhere else. I'm not sure what you meant by "bed lined" though.
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Old 11-11-2010, 07:52 PM   #36
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I never said i painted the floor with it. I painted the frame of a new barn and the boss dragged it along the floor with the loader.
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Old 11-11-2010, 08:03 PM   #37
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I never said i painted the floor with it. I painted the frame of a new barn and the boss dragged it along the floor with the loader.
No worries, I wasn't referring to you...
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Old 11-11-2010, 08:56 PM   #38
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If it's an all new subframe you're fabricating, maybe paint the insides of the box sections with weld thru primer which is made for use with spot/MIG welding. It doesn't seem to have the same adhering properties as Super Etch Primer but it will protect the interior from rust.

To treat the exterior of the subrame prior to painting, use Super Etch on bare metal, then one of the previously mentioned finishes. The Super Etch is in two parts, the primer is in a tin & the hardner/thinners in a bottle, mixed 50/50 so it's like an epoxy. So wear gloves when you put it on, it takes a couple weeks to wash off!
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Old 12-11-2010, 07:21 AM   #39
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is the powdercoating colored by red?!
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Old 12-11-2010, 11:27 AM   #40
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is the powdercoating colored by red?!
Nerdymind - you can get powdercoating done in various colours, but its not cheap.
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Old 12-11-2010, 11:30 AM   #41
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Quote:
Originally Posted by Laurence View Post
If it's an all new subframe you're fabricating, maybe paint the insides of the box sections with weld thru primer which is made for use with spot/MIG welding. It doesn't seem to have the same adhering properties as Super Etch Primer but it will protect the interior from rust.

To treat the exterior of the subrame prior to painting, use Super Etch on bare metal, then one of the previously mentioned finishes. The Super Etch is in two parts, the primer is in a tin & the hardner/thinners in a bottle, mixed 50/50 so it's like an epoxy. So wear gloves when you put it on, it takes a couple weeks to wash off!
I have closed / plated most of my box section now, but will leave some open to squirt WD40 or Paint down, but as it's 40 x 40 4mm wall box section, I think it will outlast the car. Just going to get it blasted and use a rust resistant paint like POR15 now.
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Old 12-11-2010, 11:43 AM   #42
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i have just got POR15 to do the undercarriage on my shell (was not cheap). If i have any left im pritty sure i will be coating my frame in it as the paint from allspeed flakes easy and i dont want it rusting away anytime soon.

Nathan
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Old 12-11-2010, 01:40 PM   #43
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I've just been to a local company who has quoted me 15 to zinc coat my subframe, it has already been bead blasted, so no prep work is required making the quote cheaper.
Will powdercoat be ok if a subrame is zinc coated first?
I'm hoping to have my subframes coloured to roughly the same colour as the car, if not I'll go with POR15.
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Old 12-11-2010, 03:43 PM   #44
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Originally Posted by InstantCustard View Post
I've just been to a local company who has quoted me 15 to zinc coat my subframe, it has already been bead blasted, so no prep work is required making the quote cheaper.
Will powdercoat be ok if a subrame is zinc coated first?
I'm hoping to have my subframes coloured to roughly the same colour as the car, if not I'll go with POR15.
Pass, I don't know if it can be powdercoated over the top of it. I guess you mean galvanised. Where did you get it blasted ,seeing as we are both in Surrey??
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Old 12-11-2010, 04:00 PM   #45
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Pass, I don't know if it can be powdercoated over the top of it. I guess you mean galvanised. Where did you get it blasted ,seeing as we are both in Surrey??
A place called Elgamec in Aldershot, cost me 30.

www.elgamec.com
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