Rusty engine mounts.... best paint?

crazy4557 said:
I used it last year on rusty engine mounts. This year the ruts's back again and I used loads too.

Probably only way to eliminate is remove, blast back to bare metal then repaint but that's a PITA with engines still attached:)
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Modern Hammerite is as much use in protecting against corrosion as a chocolate fireguard is useful as a fireguard. A couple of years ago I needed to adjust the alignment of my VP V8 engine to the outdrive. All engine mounting studs were of course seized. I took the mountings off one side at a time after fitting what was basically a home made "acroprop" and abrasively cleaned the cast bits and sprayed with normal car primer and a BMW red top coat. ( The original paint was red without a primer, so I expect the repainted items will now last a lot longer)
 
Second that comment ref todays hammerite being rubbish, its well known in the classic car scene.
Basically once something is rusty not much will stop the rust spreading without further work.
 
sometimes the issue can be the fact that there are traces of oil on what you are painting, I have used hammerite in the past and other various paints for boat and vehicle restorations, all I have found OK (including hammerite) but it is all down to correct preparation. Wire brush or an abrasive wheel to get the rust off, thoroughly clean up with a grease removing solvent, I use brake cleaner. . If heavy corrosion then over painting will look pretty for only a short time, but to do the job properly I use Oxycon rust treatment, stops rust and is easy to use & over-paintable - http://www.ruststopshop.com/oxycon.php
 
Thanks for all your suggestions. Have opted for using a de-oxidant followed by 2 coats of Oxirite ( No hammerite available in my area in Spain)
Oxirite has the same tech spec as Hammerite.

Cheers
 
PCUK said:
I use black Waxoyl. Never goes totally hard but dries sufficiently to not be a problem, and this does stop rust.
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I bought a tin of Waxoyl (not the back colour) some years ago for a car poject. Used a bout half of it on the car.
I keep a small jar of Waxoyl on the boat - it certainly goes a long way - only needs a light application. The engine mounts have had a thin coat and the lightest dab on various screw heads deals with early signs of corrosion. The bow thruster had some very slight corrosion so its had a thin coat too. It is best applied in warm weather. Certainly seems to prevent corrosion - or stop it in its tracks. Also a light dab on the end of the throttle cable - for lubrication.
 
rubberduck said:
This is supposed to be good.
http://www.amazon.co.uk/ACF-50-Motorcycle-Automotive-Metal-Anti-Corrosion/dp/B000P1C8UO
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I bought ACF 50 for the classic car project on the go at the moment and later took it to the boat when I had to do some engine work.
A light spray and wipe took off surface rust and months later it is pristine.
I now treat all my tools left on board with an occasional spray and can confirm rust is held at bay for months.
Its available in aerosol cans and 1 litre bottles which will take a garden spray attachment.
 
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