Author Topic: Painting exhaust help (Read 7147 times)

smp1984 · « **on:** April 02, 2006, 05:52:41 PM »

Hopefully someone can help me. I have a 2005 Yamaha R1 sportbike and I painted my exhaust pipe red with Dupli-color 1200F w/ ceramic spray paint and I seem to be having problems. It has duel exhaust which runs into a Y-pipe. I scuffed the pipes and cleaned it with acetone. then I heated the pipes with a hair dryer and sprayed them while they were heated. I cured them for about 5 hours under heat lamps. Then I installed them the next day. I started my bike and let if run for 40 minutes to try to bake the paint on. I let them cool down and then started the bike to take it out for a ride. I let bike run for about 5 minutes in the driveway, and paint became sticky and kind of "putty" like. I can scrape it off with my finger nail. Is this normal for 1200F paint or am I doing something wrong? I'm really frustrated with it. I've read where other people have done this and dont seem to have this problem. I really like the way it looks and would hate to have to have it redone and ceramic coated, but i might have to. Thanks for the help in advance.

DiscoEd · « **Reply #1 on:** April 02, 2006, 06:03:40 PM »

Hi and Welcome,

Did you happen to do a search for this topic? Try searching for VHT, High Heat, ceramic, high temp, etc. There are a lot of posts on this subject.

Here is one that I started a while back... http://www.sohc4.us/forums/index.php?topic=6321.0

I'm just going to try the VHT paint but, I wish there other cheap alternatives.

Regards,
DiscoEd

smp1984 · « **Reply #2 on:** April 02, 2006, 06:07:32 PM »

yeah i did read that one but it didnt really answer my question i guess. I guess what I want to know is Why is the paint still getting soft and kind of putty like after all i've done. Its Dupli-colors 1200F w/ ceramic, am I just not letting it cure long enough?

ofreen · « **Reply #3 on:** April 02, 2006, 06:47:42 PM »

That's kinda weird. I've used the same stuff you used and have had nothing but good luck. I posted a reply on the thread that DiscoEd mentioned. The one thing I did differently from what you did was apply the paint on cool headers. I let the paint air dry until it was pretty much tack free, then went for a ride to cure it. That was over two years ago and the paint is still OK.

DiscoEd · « **Reply #4 on:** April 02, 2006, 07:02:36 PM »

Yes, I agree with ofreen that is wierd. Could it be that the can of paint that you got was a bum mix? Did you prime or clean the pipes with anything before applying the paint?

DiscoEd

bill440cars · « **Reply #5 on:** April 03, 2006, 05:14:42 AM »

It could have been from a bad batch or maybe heating the pipe wasn't a good idea.
I think I'd try it again and follow the instructions to the letter. It's been my experience that
some products have to be done that way and some don't. You still may be able to do it yourself
and save some money. Good luck. later on, Bill

ProTeal55 · « **Reply #6 on:** April 03, 2006, 05:59:43 AM »

I made a full attempt to paint the pipes on my CB black, with poor results.
I sanded / scuffed up the pipes before painting to insure a good stick for the paint.
Did lots of light coats, and let them dry 100% in-between coats.

Paint lasted for about 2 rides , before it started flaking.
Have sience wrapped the pipes with high-heat tap, and called it a day...

smp1984 · « **Reply #7 on:** April 03, 2006, 06:13:45 AM »

This is actually my second time painting them since Feb. I didnt prime the pipes due to fact that I couldnt find any high temp primer around here. As for a bad batch I dont think its that, when i painted them the second time I went out and bought a new can from a different store. The first time I didnt heat the pipes and let them air dry for a week. This time I heated them and dryed them with heat lamps. They are fine at cool temps just get tacky and soft at high temps. I'm really baffeled by it. There isnt any bistering or pealing just really soft and tacky.

mylittleho · « **Reply #8 on:** April 03, 2006, 06:52:52 AM »

How long did you shake the can for before applying it.. I usually shake the can for a minimum of 3-5 minutes to make sure everything is mixed up properly inside.. shake it end to end and then also grab the can by the lid and swirl the can so that the ball inside will get everything out of the bottom corners of the can.. I've never sprayed an exhaust but I have had good luck with the ceramic high heat paint..

Also how were the payers sprayed on? a few Thick coats or several thinner ones?

smp1984 · « **Reply #9 on:** April 03, 2006, 07:19:27 AM »

i shook the can for about 3 minutes. I only put 2 very light layers just enough so the metal surface didnt show

ProTeal55 · « **Reply #10 on:** April 03, 2006, 10:14:46 AM »

Quote from: smp1984 on April 03, 2006, 07:19:27 AM

i shook the can for about 3 minutes. I only put 2 very light layers just enough so the metal surface didnt show

You def. need to apply more than two thin coats.

smp1984 · « **Reply #11 on:** April 03, 2006, 10:16:57 AM »

ok but would that explain why the paint is turning tacky when it gets hot?

bill440cars · « **Reply #12 on:** April 03, 2006, 11:11:54 AM »

That's really strange, sure has me stumped also. There's got to be a way but, I sure
don't know what it is. What about contacting the company with the problem? That's all I can think
ok at this time. later on, Bill

smp1984 · « **Reply #13 on:** April 03, 2006, 12:19:40 PM »

I've had serveral emails back and forth today with dupli-color and they have told me to do 30-second to 1 minute stints with engine running to bake it. they said 20-30 minutes at time is too long. I guess I'll try it. 30 sec doesnt seem long enough to me. hopefully it will work. I'm open to anything other than having to strip them again. might have to do that too. If it doesnt work i might try to find some VHT and see it works

bill440cars · « **Reply #14 on:** April 03, 2006, 01:27:36 PM »

Keep us posted, okay?

smp1984 · « **Reply #15 on:** April 03, 2006, 01:39:51 PM »

will do...gonna try it tonight...keep your fingers crossed...

DiscoEd · « **Reply #16 on:** April 03, 2006, 07:57:40 PM »

Quote from: smp1984 on April 03, 2006, 01:39:51 PM

will do...gonna try it tonight...keep your fingers crossed...

Fingers crossed here! Good Luck!

bill440cars · « **Reply #17 on:** April 03, 2006, 08:38:55 PM »

Go For It. DRUM ROLLLLLLLLLLLLl!!!!!!!!!

Later On & Good Luck, Bill

smp1984 · « **Reply #18 on:** April 06, 2006, 12:19:26 PM »

Just thought I'd give everyone an update....I've been doing the heat for 1 minute and then cool stuff the last 3 nights after work...I ran the bike for 4 minutes last night and turned it off...Sorry to report no change yet.. The paint is still tacky when hot and I touched cooking thermometer to it to check the temps. When i removed the thermometer it had red paint stuck to it....so no luck... I think I'm just going to strip them and maybe try VHT paint instead, or leave them bare for the summer and have them ceramic coated in the fall after riding season. What do you guys think, which should I do? I know if I strip them again and leave it. Its not going to be rust protected since I've sanded it down, and sanded off the galvanization. Is there any kind of like spray on rust protectant I could use temp. for the summer until I get them ceramic coated in the fall? I talk to a few places on ceramic coating, and they want about $300 and told me it would be 3-5 weeks possibly. Just looking to see what your opions are.

Thanks again for all the help all of you have been.
Shaun

bill440cars · « **Reply #19 on:** April 06, 2006, 12:38:42 PM »

I sure don't know what to tell you. I'm just hoping that you get an answer soon so that
you get what you need and I (and who ever else) can benefit from the info also. Later on, Bill

DiscoEd · « **Reply #20 on:** April 06, 2006, 02:56:54 PM »

Quote from: smp1984 on April 06, 2006, 12:19:26 PM

The paint is still tacky when hot and I touched cooking thermometer to it to check the temps. When i removed the thermometer it had red paint stuck to it....

Shaun,
Just out of curiosity what did your thermometer indicate?

Regards,
DiscoEd

ProTeal55 · « **Reply #21 on:** April 07, 2006, 08:11:01 AM »

Wrap them with header-wrap and be done with it.

you can get the wrap in different colors to suit your taste...

bill440cars · « **Reply #22 on:** April 07, 2006, 08:20:43 AM »

I, for 1, am still looking for an answer to painting them. Wrapping might be all right for
some and I'm not saying anything against those who do but, I don't like the look and there's
got to be a way. Headers and pipes have been painted long before powdercoating. Maybe 1
day, powdercoating won't be so expensive. Oh well, the search goes on. Later on, Bill

Bob Wessner · « **Reply #23 on:** April 07, 2006, 08:54:39 AM »

I ran across this on a Brit board. I noted the emphasis on thin coat(s) of paint, wonder if that would make a difference?

http://www.britbike.com/ubb/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=11;t=001520;p=1

bill440cars · « **Reply #24 on:** April 07, 2006, 11:43:04 AM »

Hey Bob,

What you found sounds like just what we needed, can't wait to give it a shot.

Later on, Bill

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Author Topic: Painting exhaust help (Read 7147 times)

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mylittleho

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