(06-03-2020, 10:41 AM)Megster Wrote: Hello.
My dear commuter bike has gotten rust over the winter. How can I get rid of this? There is rust also on the fork. Thanks #blessed
Hi Megster,
I am not against Charley's recommendations (I've done those myself also), but I have used various products for restoration purposes, all fairly inexpensive, readily available to buy, quick to use, and very little clean-up after use. All cheaper and quicker than buying and installing a new bar (removal/reinstallation of grips, brake levers and/or shifters, if applicable).
Since I work on various bikes from the '30s-present with various surfaces, I keep all of them handy; plus they work great for other uses, auto, woodworking, tools, etc.
First would be various grades of steel wool (coarse, medium, fine [000, 0000 grade]), bronze wool (coarse, fine), and "Soft Scrub" light abrasive cream cleaner (or similar product). The bronze wool might be the hardest to find (hardware, paint supply, and/or marine supply stores), and more expensive; I use it very conservatively since it is best for "softer" metal cleaning, burnishing (aluminum, copper, brass, etc.). It can certainly be used on steel; chromed or not. Also, good for glass without scratching it. Lastly is sandpaper (various grits 200 to 800, and "crocus" cloth).
Unless surface is heavily pitted, you should get by with the cream cleaner and/or medium grade steel wool. Heavier rust with some pitting may require coarse steel wool. You can use WD40 to treat rust since it has solvents that can help dissolve rust, displace moisture, and act as a sealant to further oxidation. Vinegar will also dissolve rust (acetic acid, as well as other acids), use baking soda to neutralize the acid; it usually is done for heavier rust/oxidation where a part can be dipped/soaked with vinegar/acid for hours. None of the abrasive products should cause any noticeable scratching on chromed surfaces, and using them would help to prep the surface if painting/coating was still needed. I use a small amount of alcohol to remove any residue if you plan on painting/urethane/clear coating, but I wouldn't worry about painting unless you live in a high humidity/salty environment, or if bike is continually exposed to the elements. I would not use the cream cleaner or steel wool on aluminum bike parts, as it will certainly put fine scratches into the surface unless you don't care about it having a "brushed" finish look. Nothing wrong with that, but I work on some very old/expensive/rare parts that often have anodized finishes which would be damaged from these abrasive products on softer surfaces. When in doubt use the least abrasive product first whether steel wool or even sand paper. If you keep the affected surfaces clean and dry between use, you would probably not have to paint or coat them. I use some very light oil (generally not "3in1" oil, veggie based and gets "gummy") like sewing machine oil, WD40, etc., and wipe down exposed/unpainted metal surfaces with a small amount on a paper towel or rag after cleaning giving the surface protection from general moisture damage (rust on steel/chrome or oxidation on other metals) whether there had or had not been rust or oxidation previously. Wipe off and repeat occasionally depending on use/conditions. You can always paint/coat the surfaces, or replace the part if the condition persists or gets worse. Assuming your fork is chromed (photo doesn't show it well), it would only take me about 5-15 minutes depending on level of rust to complete both bar and fork. You will find that once you have these cleaning products they will last for awhile due to the small amounts required to do the job. Remember, a new bar is just as likely to rust if exposed to the same conditions; regardless, I would still use a little oil on a new bar to help preserve it. Unfortunately, new product chroming is not what it once was, and it does not hold up like that of decades ago; plus, it's more expensive and can add weight to the bike so manufacturers "cut corners" with its use. I have used the same products and techniques on classic autos, musical instruments, tools, etc. You can purchase metal cleaners/polishes that are supposed to leave a "protective" film on the surfaces similar to car wax. I have used car wax for the same purpose as the oil wipe down; cheap, uses very little, does no harm. Experiment with products as to how hard you need to "scrub"/clean to avoid potential damage when in doubt about any surface, and start with a small amount of product (usually all you will need anyways) on an area not readily visible (bottom of bar, inside of fork, etc.)
Good luck,
Jesper
https://forums.bikeride.com/thread-6693.html
PS. Photos of near 50 year old bike l just finished that had rust on chrome surfaces, and oxidation on aluminum surfaces. Used fine (000) steel wool to clean (very carefully on aluminum!) all unpainted metals. Original parts, but didn't look as good to start with.