Painting rusty engine parts

[WindermereColvic]

This is our air filter, I’d like to remove the old paint, de-rust, and paint it again. It doesn’t get that hot so i assume i can paint it with the black Hammerite i already have. Can you advice me please what to use to take the old paint off, and what i should know about chemical rust treatments, if indeed that’s the best way to treat the problem.
Thanks, Matt

 

[VicS]

Scrape off all loose paint and rust. Use your favourite rust treatment. If you are going to use Hammerite paint then you might as well use their rust treatment too (Kurust).
Dont forget for best results use Hammerite Red Oxide primer.


An ordinary methylene dichloride based paint stripper, such as Nitromors, I should think if you want to use a chemical stripper.

BUT it is only an air filter in an engine compartment. Wipe it with an oily rag, refit it and go sailing. Life's too short to worry about painting air filters.

 

[Fr J Hackett]

I would be tempted to use a wire brush both hans held and one in a drill withe emery cloth for the parts they could not reach. Should remove both paint and rust. If you want to treat the rust use a phosphoric acid based treatment usually found in DIY type shops and car accessory shops. Follow the instructions on the bottle glasses and marigolds should be more than adequate wash down any spillages.

 

[Avocet]

I'd probably just set it on fire to get the paint off!

More seriously, I've been very impresed with a paint called "POR 15" that I've been using on the car. (You can get it in black too). It's expensive and quite tricky to use but it seems to cure very tough indeed and loves a slightly rusted surface to stick to. I got mine from this Frost Automotive:

http://www.frost.co.uk/item_Detail.... Kit &catID=&frostCat=&frostSubCat=&subCatID=

 

[late-night-lochin]

Try to find a local sandblasting company.

There is one not that far from me which I have used several times in the past and and item like your air filter housing would cost about a tenner.

I've stripped paint with Nitromores many times in the past but wouldn't even think about doing metal items now.

The sand blasting will also give a good surface for painting.

If you want it to look good, spray it don't hand paint it.

 

[Poignard]

Here's a thought

About 12 years ago I fitted a pre-heater to my BUKH DV10 but there wasn't room in the engine box for the original BUKH filter so I fitted one of these "pancake" filters instead. I bought it from ASAP Supplies Ltd, Beccles.

It is still shiny and probably cost less in materials and labour than you would spend doing up your old one.

Also no pancakes have entered the engine since I fitted it.

 

[lw395]

For some similar bits I use coarse wet and dry to remove the worst of the rust and any loose paint, then Jenolite, followed by primer and gloss paint.

 

[TQA]

Find a sand / bead blaster. many motorcycle shops and jobbing engineering places have them.

make sure you are ready to prime it as soon as it is blasted.

MUCH EASIER than the strip derust sand route.