SOHC.co.uk Forums > CB500/550
DIY engine painting..help!
Orcade-Ian:
I have used Hammerite silver smoothrite in spray cans on many engines, the first being my 350/4. This has been in use for over 10 years and still looks great. I cleaned all traces of original crap and paint and scrubbed it up with those stainless wire wool scrubbers, then etch primed with Upol acid etch 8, just a thin coat, then on with the Smoothrite. I removed some of the visible bolts a couple at a time and sprayed around where the bolt head sits, replated (zinc kit) the bolts and refitted. I have a stock of spare bolts to make it easier. A couple of years into use and I had a carb leak fuel over the top case which sat for a while before I discovered it and it cleaned off without a problem on the finish.
I am doing the spare 350/4 engine and another 400/4 at the moment but both of those were completely stripped.
As usual they are featured on my site:
www.stallard-engineering.co.uk
Regards,
Ian
Lynx:
What ever you use, the cases must be completely freeze, dirt and flake free. Personally I got a great finish with Simoniz Aluminium Engine Enamel. If you can cure it in the oven it gives a really tough finish.
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Lynx:
Petrol and a tooth brush is best for getting thick grease off. Do it in the road as to not stainless your drive 😉.
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masonmart:
If you want to do a quality job rather than a short term one then the only way to do it is to strip down the engine completely and blast it. Soda blasting has the advantage of not possibly leaving grit in passageways etc., but bead blasting is the best quality finish for painting or for just taking bare alloy of the barrel and head down to a lovely matt finish without paint. It's a pain but you have to be very careful about closing of any oilways to avoid getting grit in. Blind threaded holes can be closed off with what is usually a 6mm bolt. Paint the exterior with Ford Silver Fox two-pack epoxy paint and the finish is beautiful and hard wearing.
boilermaker1:
I painted my engine a few months ago,I did not strip the engine. I blocked all openings and had the engine bead blasted. Painted it Simonz engine enamel..This paint requires curing so I had to make up a big plywood box and line it with tinfoil .
I purchased a cheap cooking thermometer on ebay, Used a heat gun to get it up to temp.
It took five hours to cure paint properly . very happy with end result.
I got the idea from sohc USA forum
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