SOHC.co.uk Forums > CB350/400
Engine painting
buxtonmick:
Nope, just cleaned with paraffin then scuffed with scotchbrite in my case.
Lynx:
I stripped down the whole engine. Degreased with parafin and a tooth brush, then in the dishwasher before getting bead blasted by Redditch Shot Blasting. This cost £90 for the whole engine minus side casings. I then gave 3 coats of Simoniz Aluminium Engine Enamel (2 cans off eBay for £14), except for the barrels which remain bare. I cured in the oven building up from 70 C to 220 C over 90 minutes. Honda painted the side casings, but I prefer the polished look. I have also lacquered the polished bits petrol proof gloss lacquer.
Jimbo550:
As for preparation goes I used a paraffin parts washer to get the main oil and crud off, then used a wire brush or Dremel wire wheel to get any old paint off the bottom casing. For the barrels it was a little more difficult cleaning between the fins so I decided to sand blast the fins which worked well. I made a simple sand blasting gun and got some cheap kiln dried sand for £1 a bag from b&q, connected to the compressor and bingo. The fins came up really clean and a great finish for paint. Just make sure you blown all the sand off after as it goes everywhere. Hope it helps.
ST1100:
I've been instructed to use copper slag instead of sand; the slag won't get beaten down to fine, abrasive dust (not ideal for both: your lungs nor the engine/parts), yet it could even be reused (after running it though a strainer though...).
The folks across the pond use soda blasters on the delicate aluminum alloys, less abrasive to the surface.
Jimbo550:
I'm aware sand isn't the correct material to use but its cheap and readily available. It was a one off use so the break down of the sand didn't really matter. I did the blasting in the garden and the used sand just went into the garden grass. I used about half a bag of kiln dried sand. Not professional, not healthy, but it worked!!
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