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Archive for the ‘Spray Finishing System’ Category

Painting It: How to Achieve a Superior High Gloss Finish

First of all, starting out with a smooth surface is essential. With a rough surface, you will have to add exceedingly more hours of labor to even reach a starting point.

 

Metal, fiberglass or hardwoods are the substrates of choice when considering an ultra smooth surface.

 

In this instance, I will use metal as the example. No matter what the situation, the proper procedure in achieving a gloss finish includes:

 

  1. Initial metal preparation – Acid etch surface, orbital sand with #80 grit sandpaper.

 

  1. Dry and wipe surface clean with lacquer thinner, then use tack cloth.

 

  1. Using an HVLP spray system, apply multiple thin coats of high solids epoxy primer or acrylic lacquer. Let dry thoroughly. Orbital sand between coats with #400 sandpaper; then, wet sand with #600 sandpaper.

 

  1. Apply urethane sealer using two thin coats. When dry, wet sand using #600 sandpaper.

 

  1. Apply urethane basecoat using three thin coats with a 60% overlap in spray pattern.

 

  1. After two to four hours of drying, color sand using #600, then, #800 sandpaper. Wash surface with soap and water. Rinse with warm water, and let dry.

 

  1. Reapply urethane basecoat using three thin coats.

 

  1. After drying time, wet sand with #800 grit sandpaper. Wash and rinse surface. Dry and tack cloth.

 

  1. Apply multiple thin coats of urethane clear coat. Let dry.

 

  1. Wet sand with #1000 or #1200 grit sandpaper. Rinse with warm water. Let dry.

 

  1. Apply final clear coat. Let dry.

 

After all that time and preparation, you should be able to see your face in all that shine. What is paramount in order to reach such a high level of finish is a person’s skill at spray painting. No beginner can ever hope to achieve such a finish.

 

Typically, there are five elements involved which you must have:

 

  1. A well seasoned professional with comprehensive knowledge of all the modern finishes.
  2. A well equipped spray booth with positive flow ventilation.
  3. A client who is willing to pay for the best, and has patience.
  4. A preparation team who is dedicated to producing the finest finish imaginable.
  5. All those involved should have a basic knowledge of OEM and aftermarket paint material and solvent compatabilities.

 

Producing a fine finish at a hotel, on a client site, or in your home can be accomplished. You do not have to follow all of the rules above. Just keep the following ideas in mind:

 

First, wet sand or dry sand in decreasing grits #220-#320-#400.

Next, make sure that, after sanding, the surface is tack clothed. If you do not, you will have debris in the finished paint job.

Third, always apply thin multiple coats. With heavy coats, you may have runs, sags, and cracking. You absolutely want to avoid this.

Final step, set up a spray booth.

 

Also, provide adequate ventilation by (a) using fans, and (b) wet the floor to keep dust at a minimum.

 

And, if you are interested in wood finishing, some of the same methods can be used. Just keep the surface dry and dust free until completed.

 

A superior finish is all about knowledge and talent. It is about looking at such a finish and wondering, “Who could have done this? It’s magnificent!”

 

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A superior high gloss finish starts with a super skilled finisher.

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Thank you for visiting “Painting with Bob.”

Copyright 2016. Robert D. Hajtovik. All rights reserved.

Paintshop: How to Purchase a Spray Finishing System

 

To save time and money, I recommend the use of a spray system. You can purchase or rent the system you need and/or want.

 

To purchase a specific make and model, contact the manufacturer, their nearest distribution center, or a manufacturer’s sales rep. Or, the needed spray system may be available through a certified commercial equipment outlet – in-store, or on-line.

 

To rent the same or equitable system, contact or visit your local equipment rental center. By the way, equipment rental fees depend on frequency of use.

 

Of course, whether you purchase or rent, allow yourself a little time to (1) familiarize yourself with the equipment, and (2) learn the techniques involved in using that spray system.

 

The question: How much time and money do you want to save?

 

With paint spraying equipment, you need to think about a spray pump’s capacity, and the extent of your intended project.

 

EXAMPLES:

 

1.Paint a Door. It may require only a small hand-held airless, or HVLP, spray unit.

 

2.Paint a Ceiling. Use airless system, between ½ and ¾ gpm capacity. Spray tip: .017 -.021.

 

3.Paint Ceiling Deck of Warehouse. Use airless with capacity of 1-2 gpm. Spray tip: .023-.027.

 

4.Paint Metal Partitions. Use 6 cfm compressor and an hvlp, or conventional spray gun.

 

5.Paint Structural Steel. Use 9-15 cfm compressor, and a conventional or airless spray system.

 

6.Apply Stain to Moldings. Use hand-held airless, conventional, or hvlp spray system.

 

The paint spray systems used today are highly diversified. And, they vary greatly in cost. Prices can range anywhere from just under $100.00 to in access of $15,000.00.

 

When it comes to accessories, you may need to purchase an air compressor, air and/ or fluid hoses, paint supply tank, regulators, moisture separators, paint filter screens, siphon cups, etc.

 

When selecting a brand, choose from the following manufacturers:

Spray Pumps – Graco, Spray Tech, Wagner, Titan, and Apollo.

Spray Guns – Binks, Devilbiss, Sharpe, Sata, and Iwata.

NOTE: These manufacturers are recognized for the precision design and configuration, quality, usability, durability, and maintainability of their spray systems. Also, their product warranties, return and replacement policies, AND level of long-term customer service.

 

TIP: It is important to choose a system which will enable you to prime, paint, and finish a variety of projects – with various types of materials. That way you assure yourself of a good investment.

 

MINI-GLOSSARY

 

Gpm – Gallon per minute.

Cfm – Cubic feet per minute.

Hvlp – High volume low pressure.

0.013- 0.031 millimeter – Airless spray tip orifice sizes.

Orifice – (Small) opening.

 

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The quality of a spray paint or finish job depends as much on the person

pushing and releasing that lever, as on the spray system being used.

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Thanks, Graco group. And thanks, everyone, for visiting “Painting with Bob.”

 

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

 

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