Exhaust painting

hehehemann · July 04, 2004, 10:01:35 AM

i had a little rust on my exhaust so I put on some rust remover, forgot about it and the next day i saw it had stripped the paint off.
Now it's time to repaint it. I want to know is I can use rattle can spray, i have a can of Dupli-Color Aluminum DH1606 it says it's high heat with ceramic and dyno heat tested 1200degrees. Would this be okay to use? and should i use a high heat primer too?

Thanks.

oldsport · July 04, 2004, 01:08:16 PM

The can will tell you if it needs a primer. The high heat spray paints (can) I'm familiar with don't need a primer.

Also look to see if it says it's for "headers". I think I remember that header paint says "good to" 1500 F. 1200 might be OK though.

Also, header paint could require curing. That could mean letting the bike run for a while before riding through puddles, rain etc.

Aluminum? Interesting choice.

hehehemann · July 04, 2004, 03:06:49 PM

i wanted a bright green for the exhaust but they didn't have that colour. My bike is black, green and chrome colour scheme, green would have looked so good.

Can says ideal for exhaust components, radiator and cooling components, transmission housings and manifolds. Think it'll be okay?

oldsport · July 04, 2004, 03:47:28 PM

Quote from: hehehemannCan says ideal for exhaust components, radiator and cooling components, transmission housings and manifolds. Think it'll be okay?

It sounds fine.

In the past, I've hung the exhaust from a tree limb by a coat hanger.

Be sure to shake the can for a couple minutes before painting.

A couple light coats looks better than one thick one. Smooth strokes about 12 in. from the pipe.

When you're through, hold the can upside down and spray it for a few seconds to clear it out.

hehehemann · July 06, 2004, 07:57:24 AM

I have a problem now.

Finished spraying the pipe, left to dry in the florida heat for a day, mounted it this morning. i started up the bike and smoke is coming from the exhaust/engine link area. The spray on the exhuast went wet and looks like it's going to bubble. What do I do now?

Thanks

MarkusN · July 06, 2004, 08:26:34 AM

Afraid you'll have to strip the headers again. There's something on them that can't take the heat. Either the rustremover that you had on previously, or the heat resistant paint is not heat resistant enough.

Smoking when burning in the paint is to be expected, but not the paint getting runny and blistery.

Eightmarky · July 06, 2004, 09:03:54 AM

The same thing happened to me and I found that I just hadn't tightened the pipes onto the engine securely enough, so it was actually exhaust and not smoke from the paint that I was seeing. Could it be the same for you? :mrgreen:

hehehemann · July 06, 2004, 09:20:16 AM

pipes seem fairly tight. The exhaust paint is definately softening up around the top piece of the pipe and looks bubbly. I touched it with my keys and it was very soft. There is no rust remover on the pipes because I sanded them down real smooth then used the spray paint. Looks like I need higher than 1200 degrees paint but I really thought this would do the job.

hehehemann · July 06, 2004, 10:40:32 AM

Here is more strangeness.

I've let the bike idle for a few minutes, in this time the spray is bubbling up down the top connection and spreading further down. Lowe on the pipe near the underneath of the engine i touched it with my key and found this area to be very soft too.

My friend has used the exact same paint when he resprayed his bike yet he hasn't had any of the blistering problems. Does the GS run so much hotter than other bikes?

I phoned the local shop and the paint they sell is also dyno tested upto 1200 degrees. This is what I have just used so I presume it'll be pointless getting the exhaust spray from them.

Ahhhh, I was hoping to go and ride today too as I have atlast a day off work.

EvilScooby · July 06, 2004, 10:45:47 AM

Hmm,

I have an exhaust that I am gettign ready to strip and paint.
Let me know what you do to solve your problem

Thanks

500rider · July 06, 2004, 10:56:56 AM

I just saw this post now otherwise I would have warned you about using the coloured paint. I used 1400 degree paint and it blistered off too. I think the problem with mine was the drying time. I only let it dry one day and then put it on. I suggest letting it dry a week in a warm dry place. These paints use the heat to make them polymerize. If you could some how bake it at 300 to 400 for a few hours, I bet it would not blister. Letting it dry for a good long time should work though. Also, I would sugget that when you start the bike, just let it run for a few seconds and then shut it off.

I think any of the coloured paints will eventually turn black (as previous posts have suggested), even iff they don't blister.

Well there's my two cents ..

Rob

Alias · July 06, 2004, 11:05:21 AM

I used the exact same paint he is useing, or so it sounds. Mine was black. I sprayed it while it was on the bike, fairly think coats. let it dry for 20 minutes, and then rode the bike for an hour or so. I could smell the paint, but it didn't peel or bubble.

hehehemann · July 06, 2004, 11:33:19 AM

I guess I'll have to remove the new paint and start over.
has anyone used this stuff http://www.por15.com/product.asp?productid=128

Rema1000 · July 06, 2004, 11:47:29 AM

I'm wondering if there might have been some residue from the rust remover, which stuck to the metal, even after sanding. You might try stripping it, then give it a good washing. Heat it immediately to dry, like with a torch or a large oven, then repaint.

I used RustOleum barbecue grill paint from Home Depot, in matte black (only comes in black and red, I think). It doesn't seem like a hard finish, and scratches pretty easily, but it's been 1.5 years, and I'm just starting to see bits of rust coming back now. There is no bubbling, etc. There was a little smoking the first time I heated it up, but that's it.

hehehemann · July 06, 2004, 12:16:28 PM

I took off the pipe to remove the paint around the header so i can use the bike to go buy some new paint without it smoking all the way to the store. Upon taking the exhaust off I saw the aluminium paint on the engine section that touches the exhaust pipes when they are slotted in. As I don't have any sand paper (I used it all prepping the pipe) I couldn't get it off. I tried paint stripper on the headers and top section of the exhaust but the paint wouldn't come off so I'll be off riding with my smoking beast to get supplies.

Eightmarky · July 06, 2004, 12:58:40 PM

I used BBQ Grill paint (black) from Home Depot and have not had any problems with it. :mrgreen:

CasiUSA · July 06, 2004, 09:42:31 PM

Watercolors...maybe Pastel

MarkusN · July 06, 2004, 11:20:56 PM

Since others seem to have used that paint without problems i'd fisrt try riding it and see what happens. Since you'll hjave to strip the paint anyway, you' can't lose a lot. Best thing that can happen is that it actually cures witht he heat and the soft, blistery state was jsut transient.

hehehemann · July 08, 2004, 06:26:03 AM

Ater going out riding on the bike, the header area and upper exhaust remained very blistery. The lower pipe and area around the muffler is perfect. I'm going to sand down the top part and repaint with a black heat resistant paint and see if it makes a difference.

I'll let you know how things go in a couple of days.

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Exhaust painting