Monday, September 15, 2008

Grrrr...

First decorating disaster! Jason and I spent the better part of our weekend painting the back panel on our built-in bookshelves Persian Violet. Okay, it was mostly Jason who spent the better part of his weekend doing this. However, it was my brilliant idea. We were very pleased with ourselves last night as we watched the second coat drying. (Yes, watching paint dry is great entertainment around here.) It looked fantastic! Obviously, we were really excited to get home from work today and rip off the painter's tape and start loading the shelves with books and curiosities, but then this happened:




The paint is like rubber! And it's not bonding to the wood. It peeled right off when we pulled away the tape. I could probably pull away all of the paint in one giant goobery sheet. I think we did everything you're supposed to do...We primed. We painted two coats. What else is there? Should we have sanded? I have no idea and the Internet is--for the first time ever--not much help. Does anyone know what's going on here?

2 comments:

Rachel said...

You need Jarrett's advice....

Jarrett said...

Hey guys! I hope your doing well. The pull off your are experiencing is because the paint didn't bond well to the surface or didn't have enough time to dry. It probably needs overnight to dry before removing the tape, but if you gave it that long, here are my other suggestions:

There are two things to consider here: 1. surface prep, 2. type of paint for both the original surface and the new paint.

1. Surface prep: all you are trying to do is create a bondable surface. There are a couple things that hinder this. First is years of crud and airborne oil. This is particularly bad near a kitchen. This film can be removed with TSP (tri-sodium phosphate). You can find it on the paint aisle. Its a water based cleaner that you rub on and off with a rag. It pulls all the old grease off. Secondly, you do want to sand. It abrades the surface and gives something for the primer to bond to. Sand lightly... using about a 120 grit, you don't want to leave sanding marks behind.

2. Type of paint: Latex paint only works over latex paint... i.e. it won't work well over an old oil base paint because the molecules won't bond well. I am sure that Jason can tell you a lot more about this than I can :) Priming should help to overcome this, but you need to pick the right primer to bond to the wood/stain. The best stuff to adhere is called shellac, it's an alcohol based product that has been around for several hundred years. The benefit is that other than the evaporating alcohol, it is a very safe primer. The down-side is that it dries really really really fast (like in 30 seconds) so working with it can be tough (use a disposable brush). Zinnser makes a great white shellac primer that I have used numerous times and think works really well. If you chose not to use a shellac then read the label of the primer and make sure it says that it can bond to oil based paint and stain because that is likely what was used over your wood.

Other than those tips give me a call on the cell... 404-242-8884. I would love to hear from you guys :)

Jarrett