Automotive body rust question

A while back someone on BLF had mentioned a product called evaporust that removes rust chemically leaving clean iron. I plan on buying some this week, but once a few small rust spots are cleaned what should i be using to prevent further rust on the newly cleaned metal?

WD40 works temporarily. If the metal is to be painted a primer would be best probably. They also have some other rust remover that supposedly turns the rust into a primer.

Rust is not a single condition, so it depends on how bad it is, how extensive, how deep. Rust is like cancer, any that can be seen under the paint probably penetrates deep into the metal. If you don’t get all the rusty metal cleaned out, it will rust again.

Generally, though, any rust has to be removed to clean metal, then it can be treated with a product called Metal Prep that neutralizes the rust and prepares the metal for primer. There is special primer for coating over previously rusted metal, then it is ready for filler, then more primer then paint and if you get it all, it won’t come back.

This is mostly for rust spots, a stone chip that has started rusting so i’m going for simple remove rust and protect from re-rusting

In your case, for a small rock chip, i would give a light sanding (just the rusty area) then prep for paint repair. Clean and dry with a clean rag and some alcohol. Then touch up paint x 2 very light coats. Light sanding between coats.

any recommendations for touchup paint?

Any automotive supply that carries touch up paint. Sometimes it'll have the year, model, name of the color right on the bottle. It look like a bottle of nail polish. IMO, the quality of the paint is not that important but color matching is. We're just trying to seal the chip so no moisture and air can get in and oxidize further. Again, I'm assuming this is painted car surface like your bumper.

the brand I remember using is called Dupli-color. I'm assuming its American brand as they spell colour, "color". LOL

i will check whats available at canadian tire

If its a factory paint job, a automotive paint supply store will have the exact color for your car. Well its not always exact but they do know what color it came factory with. They will usually sell small amount’s for paint touch up. They have color records for vehicles that go way back.

Get touchup paint for your car from a dealer.

i’ve tried that, it sucks, its tacky and doesn’t fill holes very well, even with a toothpick

It depends on what you are trying to accomplish so advice can be very different, it sounds like you are not all that worried about perfection so clean, treat and touch up, it will slow down the rust and look better in most cases, however if you want the best check out “dr colorchip…Dr. ColorChip Paint Chip Repair, dr. color chip, repair paint chips, touch-up paint, Doctor Color-Chip Paint Chip Repair

a great product for rust is named ospho. you knock off loose rust and scale then coat with ospho and then paint right over it (it converts rust)Ospho

most automobiles come with base coat clear coat paint and the paint you buy at supply houses will not have the shine you need for touch up……real touch up paint like the stuff comes in like nail polish bottles is formulated specially as one step touch up paint although there are exceptions ( some touch up paint does come in two bottles - base and clear)

finally remember a touch up is just that and most times it will be visible, 1 or 2 spots is ok but a road rash type area will probably look worse when a touch up is attemped

I’m surprised. The Subaru and Nissan touch-up I’ve used works pretty well.

you are correct the oem products are pretty good and they are usally formulated for the the one step use

i like having the best appearance, but my priority is to prevent further rust

as I said a touch up is going to be noticeable especially if its in the middle of a panel, the nail polish type paints are literally just dabbed in and hard to hide, the dr. colorchip process uses paint mixed to match and comes as a kit for the diyer for “blending the touched up area and even though pricey its a quite simple procedure

Just to give you an idea of how a chip is done professionally:

chip is sanded smooth (feather edged) primed and?/or treated as needed
resanded
proper color is sprayed in the area and dusted outward
heres where you go for the entire panel or a touch up repair
a touch up would consist of spraying clear in the area of the damage and then using a chemical to melt the clear into the surrounding ares and “burn” the touch up in….
a “better procedure ” would be to carry the clear coat to all the panels edges

after all this is done you would wet sand buff and polish ……

the oem or duplicolor type touch up bottles are going to be just touch ups and unless they are on edges they will be noticeable…the dr colorchip is as close to the pro way as you can get……unless you want it done professionally

how much does professional cost?

heres where it really gets confusing….lol

a burn in type of repair is around 100 USD
this is the type of thing that used car lots do because it is not the best but can get away with it.most times…not putting down car lots BTW I have done this on my own vehicles and I can live with it on my 8 year old work truck or my wifes little Honda grocery car but wouldn’t do it on my Harley or my Lincoln……
A proper panel repair and paint goes about 350 USD……UNLESS the repair is close to an adjacent in which case you would blend into the adjacent panel for color matching
( a blend is a common repair and painting procedure used to make the newly painted panel appear to match closer to the entire vehicle……because no matter how good the painter or how well the paint is mixed it won’t match perfectly…hence a blend

sorry if I have confused you, but I deal with these questions daily….

BTW a lot of body shops will not do the burn in repairs because there is not a lot of profit in it and there are more chances for failure.