Topic: Honda CB fender rust - how to treat?

[Rayzerman]

I may have posted this elsewhere... I used a rust remover gel and various brushes to get rid of much as possible.  Painted the underside of the fender with silver paint (didn't want black), then applied two coats of Flex-Seal clear.  It feels like a thicker rubber coating when dry, looks grey, doesn't draw attention like black would, and seals all the joints/edges.  It's going to last longer than the rest of the bike, lol.

[Stev-o]

I like the look of that Hammerite;I was curious if it's available in the USA ?

Black is available from this ebay seller in Dallas but it is pricey...

https://www.ebay.com/itm/405822470874?chn=ps&mkevt=1&mkcid=28&google_free_listing_action=view_item&srsltid=AfmBOooqp24Mc69wmg9Y2ycZXrkFq3_WbwavvVENKyArcIx27wFB46dn07s

Eastwood sells a similar type paint...

https://www.eastwood.com/eastwood-rust-encapsulator-platinum-pint.html?wickedsource=google&wickedid=CjwKCAiAj8LLBhAkEiwAJjbY7_28roGp3QJHPfZEEGavRl9v5gmikXXrWKMwvwFdKECi9NUWswFL6hoCRZkQAvD_BwE&wickedid=730838757115&wcid=22174107587&wv=4&wickedsource=google&wickedid=CjwKCAiAj8LLBhAkEiwAJjbY7_28roGp3QJHPfZEEGavRl9v5gmikXXrWKMwvwFdKECi9NUWswFL6hoCRZkQAvD_BwE&creativeid=730838757115&wcid=22174107587&wv=4&gad_source=1&gad_campaignid=22174107587&gbraid=0AAAAAD_t6zEENdlterYVSIJC3kPCqZWw0&gclid=CjwKCAiAj8LLBhAkEiwAJjbY7_28roGp3QJHPfZEEGavRl9v5gmikXXrWKMwvwFdKECi9NUWswFL6hoCRZkQAvD_BwE

[PeWe]

My K2 got black stuff under the fenders as shown earlier. Not visible with wheels and tires on.

My K6 had bitumen under the rear fender when I bought the bike used January 1979.
Sand and pebbles did not hammer the fender. I'll fix front fender at next front wheel off.

The K2''s spray sill stuff is hard and "rubberish" at the same time. Sand and pebbles silencer.

The grey Hammerite must be good for the chromed headlight ears inside that can rust.
Steel rims have usually sharp edges where welded together and roughly grinded. Paint it.

Where sold which explains. Maybe possible to find on eBay and Amazon.

EDIT: link corrected

https://www.hammerite.com/countries/

[kyle750]

Rear fender now installed 

[kyle750]

Old photos of the rear fender

[ozm29c]

Just to add my take on rust removal. Attached photos better tell the story on how I sorted my 350 rear mudguard/fender. Chrome surfaces protective taped, glass bead blasted, etch primed and then painted in a dupli-colour engine enamel.

[kyle750]

^ ^ ^ WoW ^ ^ ^

Your rear fender turned out looking fantastic.  Did the bead blasting remove most of the rust?  With etch priming and good quality paint it should be good as new. Another fender saved -  excellent work!

[ozm29c]

kyle750 - It certainly did. The bead blaster left a very clean finish which in turn was a perfect surface for the etch primer to key into.

[grcamna2]

^ ^ ^ WoW ^ ^ ^

Your rear fender turned out looking fantastic.  Did the bead blasting remove most of the rust?  With etch priming and good quality paint it should be good as new. Another fender saved -  excellent work!

   

[kyle750]

Slightly off topic but still about rear fenders.  This K1 rear fender showed up for sale on YJ.  Already bidding has pushed the price to over $200 USD  I'm quessing its the JDM sticker.  Condition also looks very good.  I would love to have this fender for my JDM K1 but it's out of my price range. 

[MauiK3]

Looks to be in great shape, maybe never really used. Price is pretty high, agreed.

[PeWe]

A new rear fender is not cheap
https://ebay.us/m/F5pqEC

I paid half from DSS UK for maybe 10 years ago.

I bought another NOS Honda for  about 2/3 of that price a few years ago from Germany. +300€

Vietnam fender
Rear
https://ebay.us/m/BQ2ll9

Front important to order right. Early fork or later. Late K2 got later fork used on K6 too.

[M 750K6]

I was initially happy to use a re-polished original. But as my rolling restoration neared completion, the mudguard was too shabby. I used a rear from Vietnam. Was a b1tch to fit. But looks stock and it's still looking clean.

[kyle750]

Someone got a bargain with this CB500 fender

https://www.ebay.com/itm/167972975190

[newday777]

Someone got a bargain with this CB500 fender

https://www.ebay.com/itm/167972975190

That says 1969-1970 CB500.
CB500 1st year was 1971.
Buyer beware.....

[PeWe]

When you have got a new tank with side covers from Yamiya or a recently re-painted old set.
Everything will look shabby if not replaced with new looking parts.

I had done all, bike still looked shabby until I ordered a new licence plate.

[kyle750]

Someone got a bargain with this CB500 fender

https://www.ebay.com/itm/167972975190

That says 1969-1970 CB500.
CB500 1st year was 1971.
Buyer beware.....

Perhaps a mistake by the seller. Sellers love to include Sand Cast in the item description. 

[jonda500]

The early 500 and 750 rear fenders are almost completely identical - the only difference is in the wiring tunnel and the wire pass through hole location. When mounted to a bike there is no visible difference!
John