kcparsons1
Junior Member
If one paints all surfaces with minwax varnish to allow spray painting the foam, is it necessary to use glue on the edges for protection?
Edge of foam protection.
- Thread starter kcparsons1
- Start date
bhursey
The Geeky Pilot
I would although try a test piece.
pressalltheknobs
Posted a thousand or more times
Yes it is necessary. The minwax doesn't stop edge delamination. In fact it may make it worse. Squeegeed hot glue before you minwax is fairly effective at stopping edge delamination.
At least that is my experience.
At least that is my experience.
Last edited:
Another alternative:
https://www.dollartree.com/Royal-Paper-Tape-for-Sensitive-Skin/p302003/index.pro
Paper medical tape (typically sold as "sensitive skin"). Apply to any open edges before minwax, wax-on-wax-off, then between the tape's glue and the minwax coating you have an unbroken, sealed paper covering . . . all ready for a damp field or a layer or two of paint.
This has become my go-to for all my DTFB builds.
https://www.dollartree.com/Royal-Paper-Tape-for-Sensitive-Skin/p302003/index.pro
Paper medical tape (typically sold as "sensitive skin"). Apply to any open edges before minwax, wax-on-wax-off, then between the tape's glue and the minwax coating you have an unbroken, sealed paper covering . . . all ready for a damp field or a layer or two of paint.
This has become my go-to for all my DTFB builds.
pressalltheknobs
Posted a thousand or more times
Have to give that a try. Sounds like to gives neater and paintable finish.
mrwzrd59
Old Guy Geek
I use this stuff. Varathane and it's similar to Deft. It has a medium to thin viscosity so it will flow into the foam and run all over if you don't plan first. The applicator tip works great at laying down a bead right in the center of the foam board edge and self levels. It seals up the edges perfectly but it takes plenty of patience to apply! Be warned, you have to leave it set-up before handling or it will drip or run into unintended areas! Minwax is cool but it can ruin your day if you get it on too thick and warp the board! I had to apply a doubler on the vertical stab on my Viggen after it curled up when laying it down too wet. One other thing about Varathane is that it can be used as a substitute for polyester fiberglass resin to lay up fiberglass mat. No smell and cleans up with water while it's still wet! I made a new canopy for one of my smaller boats after it got ripped off and sunk....I made a mold from another one and laid up my own. Super light and plenty strong! It carries my GOPRO with no flexing at all! Cool stuff! I picked it up at Lowes.
I also have used white glue on the board edges but it dosent self level as well.
HilldaFlyer
Well-known member
If you use ROSS board from Walmart, it can be painted without minwax treatment and it doesn't peel.
Here are the planes I painted with water based acrylic without any treatment to the foam.
http://flitetest.com/articles/build-f-18-super-hornet-in-ft-style
Best of luck.
97tj-neil
Member
I use a monocoat heating iron to taper the edges of the foamboard. It melts the foam under the paper to seal it and allows me to get a nice aerodynamic taper at the same time. If you want a flat edge, you can do that as well. This is a really fast way to seal your edges, and adds no weight.
This also works great for bonding the hinge lines instead of sealing them with squegeed hot glue.
This also works great for bonding the hinge lines instead of sealing them with squegeed hot glue.
mikeporterinmd
Still Learning
Padroo
New member
I haven't tried it yet but when I try it I will do a test piece and adjust my iron settings accordingly.
kacknor
Build another!
Duct tape is a fine choice, given the weight. The leading edge of this Bloddy Wonder wing is duct tape. There is more on the bottom of the wing also. THe red & blue are colored packing tape.
JD
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