Painting project gone wrong

Hi all. Last year, my wife decided to reprint our main level. Unfortunately, she didn't have enough paint on the roller, so it left rough spots that are visible when the light hits it just right. I'm tired of looking at it and want to reprint. So....simple questions - will repainting over with a high quality porter paint cover the rough spots, or do I need to sand them down first? When you run your hand over them, you can't really tell the difference between the rest of the wall surface, so wondered if sanding was necessary. Thanks guys!

 

You should ALWAYS lightly sand a wall before painting.

 

I agree a light scuff sanding is always a good idea prior to repainting. A full coat of paint should make those areas disappear with or without sanding.

 

You refrence "porter paint", what is that?

 

Porter is a brand of paint. Like most they have builder grade and better. Biggest thing I remember about it are the orange 5 gallon buckets and that they only hold 4.75 gallons...... unless my memory is faulty and I've got it mixed up with another brand

 

PPG'S product line. Also sold in some hardware stores.

 

I believe what you are seeing is called "flashing" where uneven coats of paint end up with different levels of sheen on the wall. Multiple coats helps make sure that enough paint is on the wall. Keeping a wet edge on the wall (no breaks in the middle of a wall) and always finishing a stroke in the same direction (last stroke always down for example). In my opinion, eggshell finished are the biggest culprit of this. Don't be so hard on the wife, she just needed to add a second coat, shich is what you are doing now. A heavier nap on the roller might also assist, a 1/2" nap instead of 3/8" will apply more paint.

 

I didn't know PPG bought out Porter. Porter used to have their own paint stores that only sold Porter paint and sundries. I haven't use Porter paint in 20 yrs or more.

I always use 1/2" nap on walls! The roller stipple difference between it and 3/8" is negligible and the 1/2" is quicker/easier.