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03-30-25 | 07:19 AM

#84

awac

Senior Member

Joined: Oct 2022

Posts: 617

Likes: 451

From: UK, New Forest

Bikes: 1948-49 Allin SB Long Term Resto 1948 Raleigh Lenton Clubman Frame Project 1950 Raleigh Clubman Frame Project 1951 Claud Butler New Allrounder Frame Project 1959 Claud Butler European 1977 Motobécane C4 1977 Carlton Clubman 1980 Gitane Sprint

Ok Sulphamic test day.

I was going for ;
1 cup=236ml.
2360ml=0.51 gallon
1:10 strength mix.

But that was too scientific so went with;

1 cup/236ml to 15lt of cold water (now sitting in the sun of 24c today). I will use the measure of cup/litre to help with your measures if you try it, get the cup-measure spoon from a home baking store in the UK or US.

Made up the bucket of bi-carb at twice the strength, 2 x cups to 15lt to act as a dip and acid neutraliser, make this first as a wash if you need it! Don’t forget gloves and eye protection etc.

If it is too weak I can add more. Looking for a mixture I can leave overnight 12-24hr that does not harm paint or decals and takes rust off. I like to drop something in a bucket and do something else and not stand watching it, more of my life to go around…..lol.

Fork was chosen because it’s bent, it has I think factory blue underneath what looks like a rattle-can black top coat with slight rust on the stem. If it takes bad prep paint off but leaves factory paint, well that would be a holy grail bonus! Forks not fully submerged so I can see if any fading occurs when they are pulled out.

Stem is chrome steel with a steel wedge, not aluminium. I expect it will be too weak, but you never know…..

Test subjects

In we go

Hole cut outs for fork

The measuring cup!

Rusty stem

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