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valpd
removing rust on wooden columns

Location: WI

Rust is showing up on our wooden columns located on our front porch. The weird part is that the rust is more apparent on one column and not on the other. What would be the easiest way to remove the dust? In the past I have used high quality exterior paint and just painted over it. That obviously has not worked well. I am far from a handyman, but I'm willing to try.

ordjen
Re: removing rust on wooden columns

Valpd,

Did you spot prime the rusty nails first with an oil based primer? The water in latex paints will aggravate the rust. Latex is also more vapor permeable than oil.

Also, your decorative footings will last longer if they are kept out of contact with the cement floor. Cement wicks water up into the wood. Mount them about 1/16th of on inch off the surface, then caulk the resulting gap with a quality caulk, preferably a urethane .

valpd
Re: removing rust on wooden columns
ordjen wrote:

Valpd,

Did you spot prime the rusty nails first with an oil based primer? The water in latex paints will aggravate the rust. Latex is also more vapor permeable than oil.

Also, your decorative footings will last longer if they are kept out of contact with the cement floor. Cement wicks water up into the wood. Mount them about 1/16th of on inch off the surface, then caulk the resulting gap with a quality caulk, preferably a urethane .

I did not spot prime. What primer/paint would you recommend that I use? If you look close the footings are not in contact with the cement. It sounds like I should use a urethane caulk afterwards.

ordjen
Re: removing rust on wooden columns

valpd,

Just spot prime the rusty areas with an oil based quick dry primer such as CoverStain, then face of the area with paint.

valpd
Re: removing rust on wooden columns
ordjen wrote:

valpd,

Just spot prime the rusty areas with an oil based quick dry primer such as CoverStain, then face of the area with paint.

I might as well just paint both columns completely and caulk the bottom.

valpd
Re: removing rust on wooden columns
ordjen wrote:

valpd,

Just spot prime the rusty areas with an oil based quick dry primer such as CoverStain, then face of the area with paint.

Is there a specific paint that you recommend?

jkirk
Re: removing rust on wooden columns

b.i.n shellac based primer.. that column should have been built using stainless steel nails

valpd
Re: removing rust on wooden columns
jkirk wrote:

b.i.n shellac based primer.. that column should have been built using stainless steel nails

Thanks. Since this primer is white do I paint afterwards. If I should paint what type of paint is recommended? Its in the 50's here in WI. What is the ideal temperature for painting something like this?

jkirk
Re: removing rust on wooden columns

yes you have to paint over the primer. the primer is simply a sealer that grabs the paint. you might want to wait a little longer before painting it. its still a little cool though im not sure of hte exact tempearture conversion from fahrenhiet to celcius. typically here 10 degress celcius is about ideal. above 25 and it dries too fast. below zero and it just freezes before it cures

valpd
Re: removing rust on wooden columns
jkirk wrote:

yes you have to paint over the primer. the primer is simply a sealer that grabs the paint. you might want to wait a little longer before painting it. its still a little cool though im not sure of hte exact tempearture conversion from fahrenhiet to celcius. typically here 10 degress celcius is about ideal. above 25 and it dries too fast. below zero and it just freezes before it cures

What type of paint would be ideal to use? So it sounds like I would need to wait until its 50-60 degrees. Should I use a paint brush or a roller? Also, what size primer and paint can should ii look at getting for these 2 columns?

ordjen
Re: removing rust on wooden columns

valpd,

50 degrees fahrenheit is on the low end of the advisable working temperature, although some paints allow temps as low as 35. Read the label, but in general, when you are comfortable outside in normal clothing,the paint will work well.

A quart of paint will cover 70 t0 80 square feet of surface, so it should be plenty.

You can roll and brush or just brush on such a small project. If you roll, brushing out the roller texture will give a better surface appearance, especially if you are using a paint with a higher sheen.

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