Hull Paint Project, Part 6

Placida, FL

Here is the expert advice I got from Jamestown Distributors after they read my previous blog post and looked at the picture.

Looking at the picture, it appears that the paint ran and left brush marks. Causes are usually too thick a coating was applied and having thinner on the brush will cause the paint to run.

After sanding the paint down, be sure to clean the surface well using denatured alcohol on a rag, then wipe dry with a clean dry rag.

We suggest thinning the paint 5 - 10 percent, use a foam roller. Prior to rolling, run the clean roller over some tape with the sticky side up to remove any particles on the roller. It may look clean, but this really does make a difference. Roll on a THIN coat, if thinned properly it should lay down smooth without the need to tip. For the first coat you will need to do a light sanding before the second coat. If that works well with an even smooth finish then do the same method for the second coat. If you are still getting sags and runs you are not rolling it out thin enough.

 I still have doubts about it being too thick. I'm an engineer and I do things by the numbers.  THICK or THIN are not numerical,  ml/ft^2  or  ft^2/ml are numbers.  If I spread it twice as thin as last week, I have enough paint for 6 coats, but the quantity ordered was supposed to be enough for only 2 coats.  Nevertheless, next time I'll spread it as thin as I possibly can.

My personal theory about the mistake was using thinner on the tipping brush.  It was running thinner that created the problem.  We won't do that again.  I did it because a YouTube video on roll and tip, talked about thinner on the tipping brush.  Note that now I am advised to do almost no tipping at all.

Of course, everyone else in the boat yard, plus all friends and relatives all have their own advice to give; and (guess what) the various advisories don't agree with each other.  I can't allow it to be a project designed by committee.  But I'm going to call Greg and ask for his advice.

Our Status: On Sunday we finished the hard work of sanding off the paint.  We could have been ready to repaint the primer coat today, but the package with the new paint won't arrive until Wednesday.  We'll have to waste some time until the.