Posts Tagged ‘sandpaper’

Paint Must Be De-Glossed Before Adding A New Coat On Top

September 29, 2020


The original paint in both these photos was a gloss or semi-gloss. When it came time to update, someone applied a coat of new paint right on top. Then the floor guys came and stained the floor. To protect the new paint, they applied painter’s tape. Unfortunately, when the tape was removed, it took some of the new paint along with it.

Believe it or not, even something as relatively gentle as wiping wallpaper paste off the woodwork is enough to cause poorly-adhered paint to delaminate.

This happens because the new coat of paint was not given a sound surface to grab ahold of and adhere to.

To have properly prepared the original gloss paint to accept the new coat of white paint, the painter should have done one or more of the below:

1.) Sanded the paint to knock off the gloss. This leaves dust residue, so that dust will need to be wiped off with a damp rag or sponge (rinsed clean frequently) or a Tack Cloth.

2.) Wiped down with liquid chemical deglosser, such as Liquid Sandpaper.

3.) Primed with a bonding primer, formulated to stick to glossy surfaces, and also formulated to serve as an appropriate base for the new paint.

A primer is also not a bad idea to follow up in the case of 1.) and 2.) above.

Yes, all of this is a whole lot of work, and it creates dust and/or odors, takes more time, and adds cost.

But it’s a step well worth the investment, because properly prepped and painted surfaces will hold up and look professional for decades to come.

3M Is Confusing Me; Stupid Packaging

February 3, 2013

Digital ImageOn the left is a sanding block I am used to buying, 3M brand. On the right is what I found at Lowe’s today, along with a package of sandpaper, also 3M, I bought at Home Depot yesterday.

As a regular purchaser of this product, I didn’t recognize the new packaging. Or, maybe it’s not new, but a different line of a similar product? Maybe it’s a cheaper grade? The label makes me think they are trying to look “green.” But to me, it looks cheap, and it reminds me of the “generic” packaging craze back in the early ’80’s.

You’ll also notice that the green label doesn’t say diddly about the product. on neither the sanding block nor the sand paper. It doesn’t even say WHAT it is. There’s not even a product name, nor is there a company/brand logo!

I hope this isn’t a new permenant label, and I hope it’s not an indication of labels to come. Manufacturers should clearly lable their products, include a name, and explain what it’s supposed to do. And a little more effort in the color and graphics and layout would help attract the shopper’s eye. And, yes, please include the manufacturer’s name and logo, so the customer can easily spot the brand he’s looking for.