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Message started by Blvd1960 on 10/30/18 at 13:19:13

Title: How to refinish engine exterior
Post by Blvd1960 on 10/30/18 at 13:19:13

Good day, I just found out I should not have used a degreaser to clean the exterior of my engine. Just sprayed it on the engine and was about to rinse it (one to two minutes) and it stained the aluminum case blackish stains, looks as this part had a clear paint covering it, because it peeled.
What do you recommend to repair this damage? http://https://photos.app.goo.gl/xAtK5poerZBiqWry9 http://https://photos.app.goo.gl/f1fTqp7DYJXKetNKA

Title: Re: How to refinish engine exterior
Post by Blvd1960 on 10/30/18 at 13:20:51

Pictures

Title: Re: How to refinish engine exterior
Post by verslagen1 on 10/30/18 at 13:26:46

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1347074669

Title: Re: How to refinish engine exterior
Post by Blvd1960 on 10/30/18 at 13:29:46

picture 2

Title: Re: How to refinish engine exterior
Post by Gary_in_NJ on 10/30/18 at 13:37:23

It doesn't say it on the package, but Castrol Super Clean should never be used on cast aluminum.

I only trust simple green and a nylon brush...and a pressure washer.

Title: Re: How to refinish engine exterior
Post by Blvd1960 on 10/30/18 at 13:41:24

72696B6775260 wrote:

picture 2

THANKS!
;)

Title: Re: How to refinish engine exterior
Post by Blvd1960 on 10/30/18 at 13:43:51

565C58525950545D030501310 wrote:

It doesn't say it on the package, but Castrol Super Clean should never be used on cast aluminum.

I only trust simple green and a nylon brush...and a pressure washer.

Any recommendation on how to get rid of the stains? Thank you.

Title: Re: How to refinish engine exterior
Post by Gary_in_NJ on 10/30/18 at 14:24:14

I think the stains are permanent. You could try to polish the stains, but I think you will find they are etched into the material.

A painted engine looks nice...just sayin'

Title: Re: How to refinish engine exterior
Post by verslagen1 on 10/30/18 at 14:25:13

I would assume that the clear coat was removed.
So to get it back to stock finish, polish and re-coat.
Or completely remove the clear coat and repaint with color of choice.
Or buy new covers and never use dat sh!t again.

Title: Re: How to refinish engine exterior
Post by justin_o_guy2 on 10/30/18 at 14:35:22

Sufficient road grime makes it easy enough to not care.
Ride it.

Title: Re: How to refinish engine exterior
Post by batman on 10/30/18 at 14:59:56

Aircraft stripper will remove the rest of the clear, you could try polishing and recoating with clear (IF YOU ENJOY HOURS OF WORK) . Others have found it much easier to find paint used for repainting "mag" car wheels (which is Silverish-many different shades) ,it looks decent ,and is tough ,but doesn't gleam like chrome.

Title: Re: How to refinish engine exterior
Post by Blvd1960 on 10/30/18 at 15:06:14

I think this last option mentioned is the easiest and maight work well, will look for that mag wheel paint.

Thank you all!!!

Title: Re: How to refinish engine exterior
Post by Dave on 10/30/18 at 17:40:00

I stripped the clear coat from mine and polished them. They look great - but you do need to polish them a couple times a year.

I never use Simple Green, Purple Power or any of those aggressive things on my bike - I only use Bike Bright or S100....they are made for use on motorcycles and don't harm the paint or chrome or aluminum.

Title: Re: How to refinish engine exterior
Post by IslandRoad on 11/02/18 at 16:13:58

43787562737F646279717C63100 wrote:

Dave, do you remember which grade of grit you began the polishing with? I intend to polish mine as well, and was just recently wondering what grade grit to start with.

Title: Re: How to refinish engine exterior
Post by justin_o_guy2 on 11/02/18 at 18:28:43

3m green scrubbing pads on an orbital, with a spray bottle of water.

Title: Re: How to refinish engine exterior
Post by Gyrobob on 11/02/18 at 20:41:46

I made that same mistake half a century ago. The paint solutions mentioned here will work and look okay. They will, however, have to be redone in a few to several years, probably, and they will not stand up to a gasoline spill.

I was so distraught that I had ruined the factory finish on the cases of my almost new motorcycle, I took the cases off, stripped all the coating off, and polished it just enough to get the surface back to smooth shiny aluminum,... not super shiny like chrome, just a moderately polished surface appearance as close as I could get to a factory shine. Then I clear coated it with the two-part clear coat engine paint to make sure it would last and would stand up to gasoline.

It was a lot of work, but I finally got it back to looking original.

Title: Re: How to refinish engine exterior
Post by Dave on 11/03/18 at 03:10:22

477D626F606A5C616F6A0E0 wrote:

Dave, do you remember which grade of grit you began the polishing with? I intend to polish mine as well, and was just recently wondering what grade grit to start with.

Title: Re: How to refinish engine exterior
Post by GOF on 11/03/18 at 13:16:23

What would you recoat with? I use a rattle can clear on a bike years ago. Was supposed to be heat resistant. In about a year it was horribly yellowed.

Title: Re: How to refinish engine exterior
Post by justin_o_guy2 on 11/03/18 at 14:22:25

After all that work I'd be talking to an automotive painter.
Pants rub and wear it above the pegs.
There is a clear adhesive available to protect fenders from rock chips.
The orbital with green scrubbing pads and a shot of water Seriously cuts work down

Title: Re: How to refinish engine exterior
Post by IslandRoad on 11/04/18 at 02:04:52

647B7D7A6760516151697B773C0E0 wrote:

Do you use the green pads to get started or to finish it off? What kind of finish do you get?

Title: Re: How to refinish engine exterior
Post by IslandRoad on 11/04/18 at 02:16:00

1A212C3B2A263D3B2028253A490 wrote:

[quote author=477D626F606A5C616F6A0E0 link=1540930753/0#13 date=1541200438]
Dave, do you remember which grade of grit you began the polishing with? I intend to polish mine as well, and was just recently wondering what grade grit to start with.

I had the cases off the bike, and it allowed me to first use Aircraft Stripper to remove the clear coat from the aluminum. I believe I started with #320 on any rough spots, then #400, then #600, then on to #1,000. I then used a buffing wheel.

If your bike sits outside or your ride in a lot of wet weather.....or even worse you ride in the winter when they put deicer on the road - you will need to clear coat the aluminum.[/quote]

Thanks for the advice Dave. I intend to take the covers off to polish them, and I was thinking along the same lines - it's nice to have it confirmed.

I polished the forward control kit with a similar approach - up to 600 grit, and then used Autosol paste to buff them up. I was very happy with the results, and was very surprised with how well they held up without clear coat.

The main reason I want to do it is because the clear coat on all the existing parts is developing an ugly white 'crazy-vein' that's developing into a horrible white cloudy mess.

I intend to (over time) polish the crank-case covers, the fork clamps, and the top and bottom housings on the forks. I reckon I'll just leave them un-coated and accept they'll need a little maintenance now and then.

I recently dealt with some rust on the front wheel, with some 'Purple' metal polish. Crikey, what a difference. It does knock just a little off the finish but for all intents and purposes it's as good as new!

Title: Re: How to refinish engine exterior
Post by justin_o_guy2 on 11/04/18 at 11:59:00

043E212C23291F222C294D0 wrote:

[quote author=647B7D7A6760516151697B773C0E0 link=1540930753/15#18 date=1541280145]After all that work I'd be talking to an automotive painter.
Pants rub and wear it above the pegs.
There is a clear adhesive available to protect fenders from rock chips.
The orbital with green scrubbing pads and a shot of water Seriously cuts work down

Do you use the green pads to get started or to finish it off? What kind of finish do you get?
[/quote] g

Fart to stinish

Title: Re: How to refinish engine exterior
Post by sandmanred on 11/06/18 at 03:48:12

Once your clear coat is completely removed with the condition your covers are in you should be able to polish out without any sanding. I use cotton or wool buffing pads and a couple of different compound. Emery or gray compound will remove scratches from 600 to 800 sandpaper if you need to sand anything. Follow with tripoli. The I usually buff out by hand using Mothers Mag and Aluminum polish. It evens everything out and leaves a coating of some kind that help prolong the polished look. I did that process to this bell in roughly June of 2017 and it's been sitting outside ever since and other than a little dirt it still looks the same, no white oxide crust at all.

You can find the emery and tripoli at McMaster.com

http://https://i.postimg.cc/L8fthDfm/IMG-0375.jpg (https://postimg.cc/tsqZMh2c)

Title: Re: How to refinish engine exterior
Post by Dave on 11/06/18 at 04:38:53

That bell looks an awful lot like a used Scuba cylinder.

Why is there a small hole in the side? Did the used cylinder not pass a pressure test and they drilled a hole to make sure you would not use it?

Title: Re: How to refinish engine exterior
Post by sandmanred on 11/06/18 at 05:28:58

18232E3928243F39222A27384B0 wrote:

It's 20 pound CO2 cylinder. It was taken out of service for some reason. They would normally remove the valve assembly and hack up the threads to prevent future use. My local gas supplier sold it to me for a little more than scrap price. Without the hole and slot it made it made a piercingly high tone, the hole and slot that runs up to it brought the pitch way down.