In the previous article in this series, we had completed the two layers of primer paint onto the sanded area of drywall repair, with each coat slightly exceeding the width of the prior to avoid a noticeable bulge in the finished repair.
Now we are ready to apply the two, yes two, coats of paint.
And this is where I ran into an unexpected challenge.
When I started to paint over the second coat of primer on the wall, I continued my pattern of applying the paint not just on the repaired or primed area of the wall but a little bit on either edge as mentioned previously. I went very slowly in applying the paint on the parts of the wall next to the white door frame as well as the white ceiling.
Once I painted the first coat I waited the 2 hours for the paint to dry before attempting to apply the second coat which was sufficient time according to the paint can’s label. The picture above was taken just after I finished applying this first coat of paint so it it still wet.
Three hours later the paint still looked wet. Huh. I guess I read the label incorrectly.
The next day I returned to the painted area on the wall and it still looks wet. See in the above picture how it looks a shade darker than the paint on the rest of the wall except for the areas where I did not have enough paint on the brush? Well, it was not wet; it was very dry.
I went back to my basement work area to check out the paint can. Yes, it was the right paint can. How can that be? How can the paint from the paint can result in a darker tone when dried? Is it because the paint is more than 3 years old?
Nope. The reason, I believe, is that the paint was not mixed properly by the paint store. Here’s why.
In the picture above, you see two paint cans, a 4 Litre and a smaller 1 Litre, showing the same label and the same marking on top indicating the paint number. However, with a paint can 1 quarter the size the margin for error in the mixing by the paint store is significantly reduced. What I think happened is that just enough of a difference in the added paint color to the small can was enough to cause it to dry to a different tone. Another possibility is that the lid of the smaller paint can was not air tight allowing some air to get in; not enough to dry the paint but enough to change the chemistry.
So lucky for me I still had a little usable paint left over in the larger can!
As I applied the second coat of paint to the repaired area of the wall, from the larger paint can, I can quickly see that it will dry to the same tone as the paint already on the other areas of the same wall.
And, once the second layer of paint is fully dry I start to relax as I can see that it has blended in nicely with the entire wall.
If you did not know better, you would not even know that there was any type of repair to that area of the wall. For comparison purposes, here is a picture of the crack in the wall before the repair effort.
And, now here is a picture of the finished drywall repair after the second layer of paint from the other paint can has completely dried.
Time will tell if this repair effort does prevent the crack from re-appearing. I think it will. Hopefully our experience will help you if you find this type of crack in a wall within your own home.
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