Repainting aluminium garden furniture. Advice required.?

Have some old cast aluminium garden furniture, paint peeling off, white powdery 'salts' underneath. Some of the paint scrapes easily and other places seem well stuck. Do I need to remove it all? How shall I treat the 'salts'. With acid? What is the best type of paint to use for repainting.


Thanks.

Repainting aluminium garden furniture. Advice required.?
Not sure if this would be the same but I painted my aluminum siding. I used a detergent called "TSP". It comes in powder or liquid form. With previously painted aluminum you need to get the gloss and chalking substance off. The powder form needs to be mixed with water. Just spray it on and let is sit for a few minutes. After that just wash off. In your case make sure you get all of the old paint off. I would use sand paper to rough up the aluminum. After that it should be acid etched. This will help the paint stick. Use a epoxy based primer. After that I would just use a outdoor spray paint. I just found a link on how to repaint aluminum......





http://www.polyfiber.com/techquestions/s...





Good Luck!
Reply:I would use a pressure washer preferably one with at least 2,000 psi and with a power turbo tip. The turbo tip has a small pinpoint that oscillates in a spiral...really does a good job at paint stripping! You may not get all the paint off but I don't think that matters much. The "salts" sound like corrosion but I think if you pressure washed it they should blast away. (you may have some pit marks). I would spray a exterior primer on it (oil based) then when dry you could go over that with a good quality exterior latex paint. I hope you can find access to the equipment as it beats a scraper and wire brush hands down!





Another alternative would be to use some paint remover. read the instructions and see what happens on a small piece like a leg or something!
Reply:I would suggest sand blasting an etch primer and then a top coat.
Reply:I think you need to use an Etch Primer for ferrous and non ferrous surfaces.





Ensure surfaces are clean, dry, free from dirt, grease and other contamination.
Reply:The easiest way to go about this problem is to first remove all of the "salts" otherwise known as efflorescence by using a mixture of a product called TSP and warm water - after this is done, wash the remaining solution off with warm water - once dry use a latex bonding primer specifically made to adhere to aluminum - after this, topcoat the aluminum. As far as the best paint to use, that would be an exterior enamel. They tend to be a little more durable than an acrylic. Make sure you buy a water-based product, an alkyd or oil will yellow and chip over time. Water based products tend to remain a little more flexible.

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