Simple question about canvas covering.

[clermont cubby]

Wonder if Irving needs to sand before repainting? When I painted my canvas the glue was dried overnight. But I used a separate primer and finish coat. Have been very pleased with the finish.
Larry

[Irving]

Irv , what you’ve experienced is the old Crafters trick of producing a crackle finish ... paint and glue ... (Google has examples ) The only thing to do is let it dry thoroughly and re paint ...

Makes sense. Clearly the titebond is still drying and shrinking as the moisture evaporates out of it and it causes the paint to stress and crack. The titebond canvas certainly feels and appears dry. I did as follows:

1. 100% titebond on bare wood
2. Painters drop cloth canvas applied
3. Let dry
4. 2 parts titebond to 1 part water
5. let dry
6. Another 100% titebond coating

I used just shy of 6 gallons of titebond 2 for my 6 foot by 10 foot trailer.

I did the final full titebond coating because I felt like it wasn't a sealed enough membrane. After that final coat of glue, the entire surface has a thick shiny and waxy feel and look.

[Irving]

I definitely don't plan to sand or strip this paint. I'm just going to carry on with more coats. That picture is very zoomed in. The cracks are tiny. I think they will give the next coat something nice to bite into. I'm a little unsure of long long I should wait to be sure further coats do not crack. I know its terrible to rush these things... but I'm trying to have this trailer totally done and on the road by the 30th. I may give it the night and resume painting in the morning.

[KCStudly]

My experience is that the TB2 can skin over when laid on heavy and leave damp areas underneath that take longer to cure. The addition of more water than the maker recommends (IIRC they only recommend thinning up to 10/ct, but others here have had success with higher ratios... I suspect that regional weather conditions play a large roll in what will work).

If it is just cracked but not flaky, then I suppose that coating over with no prep could work, but my gut says no. If there is any flakiness at all, I would say it needs to be prepared back to a sound base.

$0.02 for what it is worth, and I admit to having little experience here. That said, I trust GPW's voice of experience on the subject.

[GPW]

Unlike everyone else , I used thinned T2 only to apply the canvas , and no more T2 after that ... A single coat of primer ,then Exterior Latex paint over the primed canvas surface .. That’s all ....
Now with the Gripper , we won’t need the T2 at all , so no potential for a “crafty” finish ...

Fortunately , Painting on canvas is my “bag” !!! Being a professional Artist for over 50 years , I’ve easily painted much more square footage of canvas than all of the Foamies seen here combined ... Not a boast , just Lots of experience ...

[atahoekid]

When I cànvasses the foam trim pieces on Road Foamie, I used Grpper and am well surprised by the hold. I coated the foam and side of the canvas that adhered to the foam with Gripper. I put it on thick enough to dampen the canvas thru. Applied canvas and then immediately primed the whole piece. Even in the difficult corners, this worked well. No odd shrinkage or drying issues. IMHO, Gripper works great, it's easy tu use and pretty inexpensive. Just don't let it dry on your skin! You'll be scrubbing hard to get it off Just one more method. To each their own.

[GPW]

Mel, you can bet I’ll be going with the gripper on the FS ...

[Fyddler]

Will gripper still be as water proof as TBII? I will be using this method over wood, not foam.

[GPW]

Fyd, That’s a tough question to answer without more “testing” ... But if it was me , I’d ‘treat” all the wood with several generous coatings of "the mix" first before priming ... Why take a chance with wood ?

FYI: The mix ... 75% Mineral Spirits, 25% cheap polyurethane varnish .... soaked into all the wood surfaces , especially on the end grains ... Multiple coats seem to work best, you can tell when it’s saturated as is refuses to take more ... let dry/cure thoroughly , then prime and paint ... That should hold up really well in the long run ....

[atahoekid]

Gripper primer then paint should should do a great job of keeping water out, as long as the paint stays good. The "mix". Will help ensure no woof rot

[Irving]

I applied 2 more coats of behr exterior primer/paint in one today. Seems to have taken care of my crackling issue nicely. It's all filled in a smooth now. I think that the titebond 2 wasn't quiiiite dry enough for the first coat of paint.

[GPW]

[Fyddler]

I have been looking at the HF 9x12 canvas drop cloth, but it turns out there is a seam, so largest seamless size is 6x9. My walls are 12' long and I was hoping to avoid a seam. If I use a heavy primer such as block sealer and light sand will the seam be very noticeable, or should I keep looking for larger material?

[GPW]

The seam will show .... best keep looking for larger material .... It’s available ...

[Fyddler]

Thanks. Since I'm going over wood I was considering muslin, more googling!