The kind I use says safe for all finishes, but I'm still careful not to leave it on there long. I usually hit it with a brush after I spray it on, then make sure to rinse it well.

 

jay you can purchase s100 at any harley dealer thats where i got it. but you can find cheaper online.

 

ive used the rattle can stuff before. its never held up. usually just starts flaking off.

 

I had a guy that wanted his gray engine painted black. He wanted it done on the cheep. And did not want to remove anything. I said I'll see what I could do.

Make sure you want to really do this. After you scuff up the gray paint theres no looking back.

Before you paint any gray parts. Scuff the parts up with medium grit sand paper. Make sure there is no shinny spots on the paint. Then rinse the engine. Let the engine dry.

You need to tape everything that isn't gray. The fins will be the hardest. You have to tape the shinny edges on the fins. I used that blue painters tape. It sticks really good and comes off easy.

It took me about two days to tape everything. Used one of those Xacto knifes to do the fine cutting around the fins, rocker boxes and cases. When you finish covering up everything it's time to paint.

I used Krylon's Black Wrinkle Finish paint. Start on one side with a lite coat of paint. Work your way around the engine to the other side. Spray a lite coat of paint there. By the time you finish, it will be time to go back and paint the second coat on the first side. You can now spray on a heavier coat. Be careful, don't let the paint run.

When your done painting let the paint dry about ten minutes. This was my first time so I just guessed the drying time. After drying take all the tape and paper off the engine and bike. When pulling the tape off the case edges pull the tape down the edge and away from the paint. This way you won't pull paint off the engine. Do this with the fin edges too.

Now you have all the paper and tape off the engine. Start up engine and let idle. The heat from the engine will make the paint wrinkle. Don't worry about how long the paint is baking. The longer the better.

If you are worried about the engine idling to long. Take a floor fan, turn it on to high and stand it in front of the engine pointing towards the rear. This is how the dealers keep engines cool in the dyno room.

After I let the paint set up with the engine running, I shut it down. I touched the paint with my finger and it felt like it was hard as a rock.

I then took the bike for a long ride. And got it as hot as any engine gets when riding it. I came back and let completely cool down. Then I sprayed all the black paint with S100 Engine Brightener. I again took the bike for a ride and let the Engine Brightener bake in.

It came out pretty good. The guy loved it. It's wasn't a professional job, but sure looked close. And the great part the engine did not have to be torn down. It's been a year now and theres been no flaking.

You want a professional job? Talk to Joe from, The Power Pro. He posted on the first page of your Thread. What I see on his Web Site he does a great job.

Good luck....

 

tomt thanks for the write up. i appericiate your time. i paint myself. a buddy of mine has a paint booth that ive used to paint previous bikes that ive owned. the last bike i painted i tried using an industrial paint (its the same paint used on construction equipment) on the motor. i sold that bike before i put alot of time and heat on that motor. one thing that i did that might make the tedious job of taping things off was i used wheel bearing grease and a paint brush and slap it on the small parts you dont want painted. after the paint job it wipes right off. and if the surrounding surface areas where properly cleaned and prepped and primered itll hold.

i talked to someone that has used the por15 before. they said once its on it will never come off and nothing will strip it off. he also said if put it on over a bolt your not gonna get that bolt off again. im wondering if tal strip will take it off. that might be something ill have to play with just outta curiosity