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Fundamentals of stripe coating

From JPCL, January 2014

More items for Quality Control

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Tagged categories: Edges; Paint application; Quality control; Striping

Comment from Michael Deaton, (2/26/2014, 7:03 AM)

After supervising the 1 million square foot Innerbelt project in Cleveland last year and dealing with the very intense inspection by Mr. Dave Nolan, owner of Quality Control Services, stripe coating was an essential part of the coatings application. There is over a half a million bolts on this project and the finish coat is white, therefore the stripe coat must provide a paint tight seal. Painters utilized 4" cigar or weeny rollers to apply 1st the organic zinc, then macropoxy 646 and finally the acrylic polyurethane to all bolts, edges, welds, etc. The finish coat only required striping where the airless gun could not access, but both the primer coat and the intermediate required full striping. This striping was very time consuming and should be factored into any bid.


Comment from Tom Selby, (2/26/2014, 12:49 PM)

It makes more sense to get all blasted surfaces covered with the first coat of paint so that there is no compromising of the quality of the initial blast. After that coat is dry a contrasting color can be used to stripe coat with a brush or weenie roller.


Comment from Billy Russell, (2/26/2014, 4:35 PM)

Great Article !!!!! "Now end the "Can we spray the stripe coat" if you want a coating system to Last stripe with Brush/Roller contrasting color, Then make sure it's right.


Comment from Karen Fischer, (2/28/2014, 10:03 AM)

Great Article! In my experience, both brush/roller and spray application of the stripe coat can be appropriate depending on the location on the structure. I've found that the edges of flanges respond better to spray application of the stripe coat (brush strokes often "clean" the paint from the outside corners/edges defeating the purpose), whereas, brush application is far more appropriate for areas such as nuts/bolts and complex areas. Both methods can be applied concurrently. I agree that application of a stripe coat after a full coat is by far the best method to preserve the newly blasted surface.


Comment from Tom Selby, (2/28/2014, 10:26 AM)

It also is helpful to use unthinned paint on the edges. The paint will have more of a tendancy to not pull away. Then thin the coating before stripe coating the welds as they can sometimes present an irregular surface..


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