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Posts tagged ‘Surfaces and Areas’

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Steel Wool Guide and Sandpaper Grit Chart

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Painting It: Which Way is Best? Part 1: Surface Types, Exposures and Finish Life

Answer the following eight key questions. Determine which paint or coating is the best one to use on the project.

 

  1. What general type of surface do you have?

 

  1. What specific type of surface do you have?

 

  1. To what will the surface be exposed?

 

  1. How long, and how often, will the surface be exposed to damaging elements?

 

  1. How long do you want, and need, the surface finish to hold up?

 

  1. How much can you afford?

 

  1. How must the paint or coating be applied?

 

  1. Will you be applying the product? If so, how much experience do you have using the specific product that needs to be used?

 

TIP: Always base the answers to these questions on your particular needs.

 

Here are some guidelines to help you make the best choice.

 

Each paint or coating product has been formulated to be applied on specific surfaces.

 

1. IDENTIFY THE GENERAL TYPE OF SURFACE MATERIAL.

 

Examples: Is it wood, metal, masonry, plastic, or something else? Or, is the area made of a combination – of materials – eg. wood and metal, wood and masonry?

 

2. IDENTIFY THE SPECIFIC TYPE OF SURFACE MATERIAL.

 

Examples: Is the wood oak, mahogany or teak? Is the metal ferrous or non-ferrous? Note: Ferrous metal contains iron and will rust. Non-ferrous metal does not contain iron; it will corrode from different elements, but not rust.

 

Is the surface bare (new/unfinished)? Or, has it been coated or finished in the past? If so, has the finish faded, chipped off, worn through to the material underneath?

 

TIP: To achieve a lasting finish, prime the bare surface before finish painting or coating it.

Know what you are dealing with.

 

METAL – Properties: Usually, very smooth and dense.

Requires: Primer that will penetrate and bond to surface before top coat can be applied.

WOOD – Properties: Smoothness varies, a porousness greater than metal.

Requires: Primer and finish that will both penetrate and absorb into surface before products begin to dry.

 

Example: A stain penetrates deeply into the wood surface. It brings with it its formulated colorant and protective qualities.

 

3. DETERMINE SPECIFIC ELEMENTS TO WHICH SURFACE WILL BE EXPOSED.

 

SUN’s UV RAYS – Dries out and oxidizes paint, coating or finish on the surface.

Recommended: Coating engineered to withstand effects of sun.

Durability: Short-term, it works. Long-term, the sun will always win.

Application: Paint surface every one or two years.

Note: Usually, no one has the time or budget to do this.

 

RAIN/WATER – Absorbs into, softens finish; loosens finish from surface. Can cause corrosion, warping, etc. Can cause breakdown of chemical bonds of paint, coating or finish product.

Recommended: Waterproof or resistant product that repels water from surface. Its chemical bonds are interwoven closely, like tightly-woven net.

Durability: Many coatings hold up reasonable period of time, if surface not submerged a lot.

TIP: Proper primer and top coat can repel moisture for years.

 

WIND – Can cause surface to become marred or scratched, or the sheen dulled prematurely.

Recommended: Utilize an abrasion resistant coating with a finish harder than standard latex.

Durability: Apply best exterior product you can afford. May even be industrial coating.

Application: Recoat surface every 3-5 years.

 

4. CALCULATE SURFACE’S DURATION OR PERIOD OF EXPOSURE.

 

SUN – All day? Or part of day, when sun hits that side of building?

RAIN – Year round? Seasonally? Downpours, drizzles, or more of a mist?

WATER – Frequently: Pool/spa/sauna area; boat dock? Daily: Bath/shower room, kitchen sink, laundry? Exposure heavy or light? Standing water?

WIND – Are there intermittent breezes or continuous gusts for an extended period.

 

5. DETERMINE NEEDED LIFE OF FINISH ON SURFACE.

 

When finish has been applied correctly, how long it holds up is up to you!

 

Proper maintenance is everything. Other than repainting: Clean surface regularly. Also, apply a wax or clear coat finish compatible with top coat product.

 

On a thoroughly prepped surface, the proper finish product will hold up under most conditions. It looks better longer, and costs less over time.

 

READ: Painting It: Which Way is Best? Part 2: Finish Affordability and Application.

 

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Happy “St. Patrick’s Day” to all. Thanks for visiting “Painting with Bob.”

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Copyright 2015. Robert D. Hajtovik. All rights reserved.

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