Touching up and protecting the chassis
Discussion
Now that my apprentice grease monkey (slamm) has sorted out the brakes on her S3, one of the next things on the list is to touch up a few rust spots on the chassis, and give it a coat of wax oil.
It looks like most of the chassis is in good nick, but there are a few areas where the coating is coming off and exposing bare metal.
What I'm thinking of suggesting that she does (while I stand around and drink tea
) is:
1) Clean off loose powder coat/muck/rust/paint with a wire brush and clean with degreaser (I find spray on brake cleaner is good for this)
2) Prepare with POR 15 Metal Ready
3) Paint with POR 15 Silver paint
4) Paint with POR 15 Tie-coat primer
5) Paint with a couple of coats of red Hamerite
6) Finally give a good spray with Waxoil
I've done a search of the archives, and this seems to be the best combination, but I'd appreciate any comments.
Also, Mel's bought some Waxoyl in an aerosol - is there any advantage in going for the pressure spray stuff (I'm assuming not, as it looks like it's the same stuff), or the thicker rubber-coat stuff?
Finally, I gather that red Hamerite isn't a particularly good colour match for the standard chassis colour - does anyone know where we could get a similar paint that does match the original colour?
Thanks!
>>> Edited by ehasler on Tuesday 25th November 16:46
It looks like most of the chassis is in good nick, but there are a few areas where the coating is coming off and exposing bare metal.
What I'm thinking of suggesting that she does (while I stand around and drink tea
) is: 1) Clean off loose powder coat/muck/rust/paint with a wire brush and clean with degreaser (I find spray on brake cleaner is good for this)
2) Prepare with POR 15 Metal Ready
3) Paint with POR 15 Silver paint
4) Paint with POR 15 Tie-coat primer
5) Paint with a couple of coats of red Hamerite
6) Finally give a good spray with Waxoil
I've done a search of the archives, and this seems to be the best combination, but I'd appreciate any comments.
Also, Mel's bought some Waxoyl in an aerosol - is there any advantage in going for the pressure spray stuff (I'm assuming not, as it looks like it's the same stuff), or the thicker rubber-coat stuff?
Finally, I gather that red Hamerite isn't a particularly good colour match for the standard chassis colour - does anyone know where we could get a similar paint that does match the original colour?
Thanks!
>>> Edited by ehasler on Tuesday 25th November 16:46
That would certainly do the job.
My only comments would be to make sure you get all the old waxoyl off (if any) before you wire brush. Once it on your wire brush, its a real pain to get out and anything you brush with it will get a waxoyl coating - not good for painting over. Secondly, I wouldn't worry too much about the colour as surely once you've given it a good waxoyl it will either be black, or if its the clear stuff will be dulled and be less noticeable also, the chassis is either under the car or obscured by various items in the engine bay. My chassis is black so I dont have that problem.
Roy.
My only comments would be to make sure you get all the old waxoyl off (if any) before you wire brush. Once it on your wire brush, its a real pain to get out and anything you brush with it will get a waxoyl coating - not good for painting over. Secondly, I wouldn't worry too much about the colour as surely once you've given it a good waxoyl it will either be black, or if its the clear stuff will be dulled and be less noticeable also, the chassis is either under the car or obscured by various items in the engine bay. My chassis is black so I dont have that problem.
Roy.
ehasler said:
My only comments would be to make sure you get all the old waxoyl off (if any) before you wire brush.
Good point. Any tips for getting old waxoyl off? I don't think there is any on there to be honest, but haven't checked everywhere.
Mine was caked in the stuff. Its pretty hardy stuff and will need some powerful degreaser to get off. Get the bulk of it off with a scraper first.
Roy.
ehasler said:On the chassis of my S3c I found that Hammerite red with a blob of black mixed straight into the tin was an almost perfect match. I used a similar method on my Griffith, Hammerite white with 5 or 6 blobs of black is an almost perfect match to the chassi on that! Rich...
I gather that red Hamerite isn't a particularly good colour match for the standard chassis colour
I find that when you've got it down to bare metal and you've brushed the lose rusty bit off then a coating of 'krust' which turns the brown rust stain into a black carbon stain before applying the paint scheme keeps the rust back for quiet a few years IMHO.
re the red hammerite, yep just put some on mine in places, by fcck its bright red
but a coat of waxoil soon calms it down 
.
HArry
re the red hammerite, yep just put some on mine in places, by fcck its bright red
but a coat of waxoil soon calms it down . HArry
ehasler said:
Now that my apprentice grease monkey (slamm) has sorted out the brakes on her S3, one of the next things on the list is to touch up a few rust spots on the chassis, and give it a coat of wax oil.
It looks like most of the chassis is in good nick, but there are a few areas where the coating is coming off and exposing bare metal.
What I'm thinking of suggesting that she does (while I stand around and drink tea
1) Clean off loose powder coat/muck/rust/paint with a wire brush and clean with degreaser (I find spray on brake cleaner is good for this)
2) Prepare with POR 15 Metal Ready
3) Paint with POR 15 Silver paint
4) Paint with POR 15 Tie-coat primer
5) Paint with a couple of coats of red Hamerite
6) Finally give a good spray with Waxoil
I've done a search of the archives, and this seems to be the best combination, but I'd appreciate any comments.
Also, Mel's bought some Waxoyl in an aerosol - is there any advantage in going for the pressure spray stuff (I'm assuming not, as it looks like it's the same stuff), or the thicker rubber-coat stuff?
Finally, I gather that red Hamerite isn't a particularly good colour match for the standard chassis colour - does anyone know where we could get a similar paint that does match the original colour?
Thanks!
>>> Edited by ehasler on Tuesday 25th November 16:46
Works for Me the only difference is i used the por15 black
if you don't want to use hammerite you could try
www.rust-oleum.nl/
they can colour match virtually anything, i top coated my por15 prep with this product
>> Edited by spivvy on Wednesday 26th November 08:36
You can use white spirit to loosen the old waxoyl to help get if off. It will be a messy job. Then a degreaser should be used to get the remaining waxoyl/white spirit off. Good luck.
I note that you only have a few rust spots to do, which is lucky, as I need to paint my complete chassis. It take ages...... and I have only got 1/2 way so far
I note that you only have a few rust spots to do, which is lucky, as I need to paint my complete chassis. It take ages...... and I have only got 1/2 way so far
rpage said:
Great, you posted exactly the questions that I was thinking of asking myself. One extra question I have is can you put Hammerite over POR-15? Has anyone done this before? I was worried that they might react badly
Thanks
Ralph
Yep - it looks like a few people here have done it, and the POR 15 website confirms this:
POR 15 website said:
CAN I PAINT OVER POR-15 WITH OTHER PAINTS?
Absolutely. POR-15 will accept all paints, including lacquer-based paints. POR-15 Tie-Coat Primer is the best prime coat to use before topcoating POR-15. Be sure to read thoroughly our directions and tip sheets regarding topcoating before using POR-15.
More info on their website here
rpage said:
Great, you posted exactly the questions that I was thinking of asking myself. One extra question I have is can you put Hammerite over POR-15? Has anyone done this before? I was worried that they might react badly
Thanks
Ralph
you must use a tie coat primer else it won't stick properly
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