• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

TR2/3/3A Good Rust Remover

Redoakboo

Jedi Warrior
Country flag
Offline
I have a 1954 TR-2 long door that has some surface rust I would like to remove before painting. Have any of you had success with any particular product? I plan to paint the areas, all behind doors or fenders, with POR-15 after I get rid of the rust. I did some research and there are so many different ways; 1 Step, 2 Steps, 3 Steps etc.

Dick
 

CJD

Yoda
Country flag
Offline
My favorite rust remover is Black Diamond blasting media from NH. Second is 90 grit sandpaper. Sand(ing) gives the best surface for primer and paint to bond to.

You probably want a chemical treatment, though??
 

DPatrick

Freshman Member
Country flag
Offline
Do some research on the comparison of Eastwood's rust convertor vs Por 15. I used Eastwood's and TP Tools rust convertor. I like both but never cared for Por 15. For surface rust I use a product that is no longer advertised to stop rust but i have used it for years and it works, Penetrol. I know of one other Triumph restorer who uses it but most people wont as it is not sold for automobile use.
 

ed_h

Jedi Hopeful
Country flag
Offline
Dick--


I'm with you on wanting to remove the rust. There are both mechanical and chemical ways to do this, but neither rust converters nor products like POR 15 actually remove the rust. They either "encapsulate" it or convert the surface layer of the rust to something else.

I suppose there are situations where conversion or encapsulation is an acceptible or only option, but IMO, most times there is no substitute for bare metal.

Though I've used some of the encapsulator and converter products, I always prefer sand blasting or phosphoric acid.

Ed
 

DavidApp

Yoda
Country flag
Offline
I have been using Clean Bite medium from Northern Tool. It is recycled glass and you do not get as dirty as you do with Black diamond. Also I have found it seems to flow better.
Cuts fast and gives a great finish as well. I put a blue tarp under the parts I am blasting so I can reuse most of the medium.

David

sand blast glass.jpg
 

Graham H

Jedi Warrior
Country flag
Offline
Phosphoric acid is good for lite surface rust,you can wipe it on with a cloth leave it for 10 minutes then nutralise it with water and dry the surface ready to rub it back and prime before the rust comes back.

Graham
 

dklawson

Yoda
Offline
+1 for both phosphoric acid and media blasting.

I have used POR for all sorts of things but I would not use under fenders. In general, it will not stick to a smooth, bare metal surface. You need "tooth" provided by either media blasting, heavy acid etching, or... a rough surface left behind by removing rust. POR can peel off in sheets if the surface is smooth. Epoxy primers generally do a good job on bare metal.
 

PeterK

Yoda
Offline
I've left phosphoric acid on new/old bare steel rusty sheet metal overnight which eliminated the rust and the result was slightly cloud bare steel - no rust. After using, wash with soap and water then dry. It won't flash rust because of the water rinse, just dry it then prime. On bare metal I always use acid etch primer. Home Depot sells PhosPhor-clean in gallon cans or something like that - it's phosphoric acid.

Not a fan or POR-15 at all.
 

Sarastro

Obi Wan
Silver
Country flag
Offline
I'm in much the same situation, finishing off my TR4A body "tub" and getting ready to prime it with epoxy primer. I'm planning to sand off the paint, clean the surface, and prime it immediately. The problem is rust in pits, which won't sand off, and rust in places that are inaccessible for sanding.

I tried a number of things, and eventually decided to sand off whatever I could and abrasive-blast the rest. I hate blasting, as it makes a mess, but it definitely does the job. I may use some phosphoric acid where appropriate. If you do a little research, you'll find all kinds of stories about poor paint adhesion after using phosphoric acid, but I suspect that the problem is really inadequate clean-up. Just wash the surface well and make SURE it is dry, and it really should be OK. The iron phosphate coating it leaves on the metal surface should provide good adhesion. But, it also leaves open the possibility of rerusting in spots that were not treated.

My remaining dilemma is a couple places where there is rust, but it is not accessible to blasting. In particular, under the front valence and inside the cavities for the tail lights. I will have to sand these manually; should be a real pain. I am considering putting some rust encapsulator on those areas, but then I don't really know how well that will work with the epoxy primer. But, at the same time, I don't want to prime over a previously rusty surface that has been minimally derusted.
 

sp53

Yoda
Country flag
Offline
Study what rust is or in this case iron oxide at an atomic level. Basically the sheet metal is pulling in a loose oxygen electron to fill the outside band on the iron atom from 3 to 4 electrons and creating iron oxide which is a bigger, weaker, and heavier iron atom than the original sheet metal or iron.

Those treatments we put on there are Band-Aids that will either fall off or stay on if you seal over them with something. They are black or gray from the acid in the product, but will fall off paint just them stay longer. Plus paint can trap the 3 layers together; it is the can part that is painful because those products can let go of the surface. The best bet is to sand off the top few atoms by sanding or blasting then getting something on the top to stop the free oxygen electron from jumping on and making iron oxide, AKA red rust.

In those tight body gravities, like on the back of a tr3, I cut an access hole with a hole saw then sand blast the best I can in there through the hole then put in a product like Waxall, basically wax and oil and figure it might last 20 years. Then it is a race to see who lives longer me or the paint job.
steve
 

Bruce100

Jedi Trainee
Offline
I like evaporust and use it a lot. It removes the rust, not an encapsulate or paint over product, and is non toxic. A soak overnight or two removes most surface to slightly deeper rust. I use it anywhere I can so I don't have to set up my sandblast cabinet as I have to haul it outside each time. On panels it is harder to use in situ. You can put a paper towel on the surface and wet it, keep it wet with either evaporust or phosphoric acid. I also will put a larger part in a.thick plastic bag and then wrap it with duct tape loosely, then fill it with evaporust.
 

TRMark

Jedi Knight
Bronze
Country flag
Offline
I've used evaporust also, works well and is not at all nasty, does not remove breath from your lungs. It does become less effective with use. I have used it mostly on small parts that should not be and/or are difficult to mechanically clean.
 

ed_h

Jedi Hopeful
Country flag
Offline
I have found Evaporust and phosphoric acid to be about equally effective, but usually prefer phosphoric because it is cheaper and lasts longer. However, phosphoric will dissolve zinc or cad plating, so if I want to preserve plating, I go with ER.
 
Similar threads
Thread starter Title Forum Replies Date
Gray_Cat Swimming Pool Acid as Rust Remover Spridgets 9
5 BJ7 Boot Rust-Through Austin Healey 13
E Rustproofing and Rust Austin Healey 2
1 General Tech Rust Proofing Triumph 7
ROARRR For Sale 1930-40's AUSTIN 10 SALOON! straight, good glass, no through rust, very complete Austin Healey Classifieds 0
D TR6 Rust and hesitation 71 TR6 6 Triumph 9
D Removing the last rust from pitted steel Restoration & Tools 11
algot1901 My Prefect in her B-Day Suit and playing with rust-Flash! Other British Cars 19
O For Sale 1969 GT6+ Mostly rust free. Triumph Classifieds 3
SteveTheBrewer Spitfire More rust repair Triumph 1
KiwiStagguy Re building my power steering 71 Stag . Rust and pitting bad . Need a business name to fix it Triumph Classifieds 0
R Rust in Block? Help needed! Austin Healey 6
F TR2/3/3A Rust under flanges Triumph 7
D MGB Stopping rust under patch panels MG 1
P BJ8 Frame Rust Options? Austin Healey 14
Rut TR4/4A Rust for sale Triumph 2
S TR2/3/3A door blistering with rust Triumph 4
R TR6 Rust on the floorboards Triumph 5
J TR2/3/3A inner sill rust prevention Triumph 1
Chuck9482912 Rust in new fuel filler neck Austin Healey 4
R GT6 Looking to purchase GT6 Rust repair question? Triumph 4
Rut TR4/4A Rust bucket, save, sell, or part out Triumph 15
D General TR Fluid Film Rust and Corrosion Inhibitor Triumph 8
J TR2/3/3A Flash Rust Triumph 21
E For Sale 1955 Austin Healey 100 /4 rust free project car Austin Healey Classifieds 3
Lukens Outer rocker showing "rust" Restoration & Tools 11
Rut TR4/4A Rust free TRs Triumph 4
69MGC MGC Cut out the Rust! MG 9
KVH General Tech New Camshaft Has Rust Triumph 7
JimLaney Engine rebuild - how critical is rust? Spridgets 3
B 1960 TR3 With rust in cylinders Triumph 7
Rut TR4/4A Rust removal by Electrolysis Triumph 9
H Bugeye seat pan rust and possible repair Spridgets 2
Popeye TR4/4A Seat frame - rust "repair"? Triumph 1
Keoke Cars keft behind turned to rust by mother nature Austin Healey 8
bugedd Rust advice Spridgets 24
Sopwith_Camel Compressed rust Jaguar 1
T GT6 Opinions on what a rust free GT6 is worth Triumph 22
C TR6 New rust discovered Triumph 10
S Rust treatment recommendation? Austin Healey 5
maxwedge5281 who buys rust buckets? Austin Healey 16
nevets "RUST The longest War" Austin Healey 5
bugedd Why the rust? Spridgets 15
catfood Self tapping screws an rust prevention Austin Healey 10
Chuck9482912 Rust holes in engine of Austin Healey 3000 Mk II BJ7 Austin Healey 22
S Rust Bubbles Spridgets 17
G Rust repair needed for 66 AH 3000 Restoration & Tools 4
B MGB-GT Best rust repair person/shop on the East Coast? MG 2
T Sprite rust Austin Healey 10
MG Lily Best way to safely remove minor surface rust? Restoration & Tools 5

Similar threads

Top