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Tried using Boeshield Rustfree - leaves residue... Any ideas?

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Forum topic by gtbuzz posted 458 days ago 1469 views 0 times favorited 16 replies Add to Favorites Watch
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gtbuzz

349 posts in 1066 days


458 days ago

I had read a couple of testimonials on Boeshield Rustfree and thought I’d give it a shot on my bandsaw CI table that had a couple of “oops” rust spots on it (I left it unprotected for about a year not knowing any better). I followed the directions on the bottle and wet down the surface, let it sit and wiped off after about 30 seconds. It actually worked pretty well at removing the rust stains, however, there was a pretty bad side effect – it seems to have left an odd deposit behind.

That picture shows it off worse than it actually is. The flash is a little harsh and I got it at just the right angle, but you get the idea. If you look at the table straight down, it’s not really as bad. There’s no texture to it, it seems like there was just some hazy deposits left behind in the table.

I went to the Boeshield website and read this:

For light rust on steel or cast iron, spray RustFreeâ„¢ on a rag and wipe surface. Do not spray directly on surface, as it may cause spotting.

That’s different than the directions on the bottle, so yeah, thanks for that.

Any ideas on how to clear up this haze? Tried mineral spirits but that didn’t seem to do anything. For what it’s worth it did work pretty well in its intended application.


16 replies so far

View kdc68's profile

kdc68

1956 posts in 901 days


#1 posted 458 days ago

Wow…It may sound odd (and am just guessing) but you may want to try to spray the Boeshield on a rag and aggressively wipe a small area to see if it removes the residue. Maybe you will reactivate it by doing so and will come off…good luck

-- Measure "at least" twice and cut once

View ScottKaye's profile

ScottKaye

274 posts in 577 days


#2 posted 458 days ago

If the above doesn’t work for you, you can always strip it. Try mineral spirits first. If that still doesn’t work, take a 3m scotch brite pad (fine to ultra fine) and use some rubbing compound and attack that top. I use a 3m pad that I cut into a circle attached to my 5” random orbit sander whenever I need to clean up a top prior to protection. this will get your top clean with out gouging it out like sand paper can do over time.

-- "Nothing happens until you build it"

View ScrubPlane's profile

ScrubPlane

187 posts in 820 days


#3 posted 458 days ago

I had the same effect once with Boeshield due to my own error. My suggestion is to strip your top down as Scott recommends and then re-apply the Boeshield in very, very light layers…building up over several applications.

Not sure if you did the same thing I did but the first time I used the stuff I sprayed it on too heavy and left it. I know they say you can let it sit but as I noted I did not have any luck.

It really is a good product…suggest you try again.

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gtbuzz

349 posts in 1066 days


#4 posted 458 days ago

Yeah, I left it on for the 30 seconds (maybe it was a minute) that the bottle advised. I really am starting to think that was my downfall. Kind of irritating that the directions on the bottle don’t match the directions on the website. Tried going over the residue areas with the Rustfree sprayed on a cloth and it didn’t seem to help much unfortunately.

@ScottKaye – when you say strip it with some rubbing compound, do you mean something like this? After that can I go at it with my normal regiment of T9 + wax?

View AdrianM's profile

AdrianM

80 posts in 935 days


#5 posted 452 days ago

Try CRC 3-36.

View GerryB's profile

GerryB

44 posts in 1207 days


#6 posted 452 days ago

Or, . . . You could use a good metal polish and crumpled up aluminum foil. The foil will not scratch the cast iron, but should take off the residue.

-- The pursuit of excellence is gratifying and healthy. The pursuit of perfection is frustrating, neurotic, and a terrible waste of time. Edwin Bliss

View HorizontalMike's profile

HorizontalMike

6923 posts in 1538 days


#7 posted 452 days ago

Try using the Scotch Brite pad with the RustFree in one hand, and with the other hand have a clean shop towel/rag to immediately wipe off. I have also used #0000 steel wool with the RF. IMO, it is important to NOT let this product dry on the cast iron. At this point you may have no choice but to resurface the top with abrasive pads. And I like Johnson’s Paste Wax better than Boeshield.

FWIW, I also learned the hard way… 8-(

-- HorizontalMike -- "Woodpeckers understand..."

View Willeh's profile

Willeh

228 posts in 964 days


#8 posted 452 days ago

Looks more like the oil lifted some prior wax? I would strip it down and try again.. I’m also a fan of using an autmotive carnuba wax on cast iron surface to keep it sealed..

-- Will, Ontario Canada. "I can do fast, cheap and good, but you can only pick two... "

View Charlie's profile

Charlie

1008 posts in 911 days


#9 posted 452 days ago

I use G96 Gun Treatment. My shop doesn’t have permanent heat, and in winter I heat it up quick with a propane mini-salamander and then maintain with electric heaters. So the humidity can vary wildly. Used G96 last year in late summer. Just checked all my CI stuff yesterday. No rust.

I clean with mineral spirits, then use the G96, and then next day I put on a few coats of Johnson’s paste wax.

View poopiekat's profile

poopiekat

3584 posts in 2359 days


#10 posted 452 days ago

I’m used to inhaling the fumes from various aerosol products, with little or no reaction. I can tolerate anything, but Boeshield paralyzed my lungs in a way I’d thought I’d never recover from. I can’t speak for everybody, but it was three days of real discomfort in the chest after using this product on a table saw in a humid environment.
Please be careful, work outside or use ventilation!

-- Einstein: "The intuitive mind is a sacred gift, and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift." I'm Poopiekat!!

View HorizontalMike's profile

HorizontalMike

6923 posts in 1538 days


#11 posted 452 days ago

Ya’ think?...Boeshield Rust-Free spray contains Phosphoric Acid, a very strong acid (pH of 1.75).

-- HorizontalMike -- "Woodpeckers understand..."

View RonInOhio's profile

RonInOhio

720 posts in 1489 days


#12 posted 452 days ago

I Second CRC-3-36 . Its the best rust inhibitor out there.

View gtbuzz's profile (online now)

gtbuzz

349 posts in 1066 days


#13 posted 450 days ago

Thanks for all the replies. I several of the different methods here including refinishing the top using rubbing compound and a Scotchbrite pad. That worked okay (definitely made the top a lot shinier and got rid of some of the stains from various finishes accidentally being placed on top), but what ultimately worked the best was… Boeshield Rustfree. Horizontalmike was right, the best way to use it is to spray a cloth, wipe the surface and quickly wipe off any residue. Doing this a second time pretty much cleared everything right up. Here’s a picture of the “finished” top:

Most of the un-evenness in the picture is the harsh lighting combined with the crappy job I did waxing the surface afterwards. I wish I had a picture of the original with the rust spots and stains, but despite the troubles I had with it, the Rustfree did work quite well. Just wish the directions on the bottle weren’t wrong. Live and learn I guess.

Also, as others have noticed, the stuff is RANK. I had to wear a respirator to have any hope of actually using the stuff (I wouldn’t even bother with a dust mask). Could still smell it through the respirator actually; I have a 3M mask with the P100 particulate filters – those normally work well with most finishes, but this is probably a sign I should opt for the vapor cartridges instead.

View kdc68's profile

kdc68

1956 posts in 901 days


#14 posted 450 days ago

gtbuzz..Looks a hell of a lot better !...

-- Measure "at least" twice and cut once

View HorizontalMike's profile

HorizontalMike

6923 posts in 1538 days


#15 posted 450 days ago

gtbuzz,
Great job on the surface!

The white residue is a stable iron phosphate coating, a chemically changed surface that is rust resistant because the iron is chemically bound to the phosphate and NOT readily available to bind with Oxygen and begin rusting. After recoating/resurfacing as you have, the surface should now be less prone to flash rusting, though it will have/develop more of a gray cast and be a bit less shiny. That is where I use the JPW (Johnson’s Paste Wax). It brings up the shine and makes the surface much slicker once cured and buffed.

-- HorizontalMike -- "Woodpeckers understand..."

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