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Author Topic: Brush On Finish - Not by Choice  (Read 604 times)

Offline Ken Culbertson

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Brush On Finish - Not by Choice
« on: February 18, 2023, 03:01:44 PM »
I am going to have to use brush on to finish the fuselage on my Endgame II reaching the finishing stage.  I am not going for a front row finish.  Row 3 would be nice.  Wings and stab will be monokote but the fuselage has just too many curves and I need to be able to paint it.  What I am looking for is a color (Red, white and Blue - thought I would be original LL~) that I can brush on then wet sand and rub out the brush marks.  Build up will be CF veil applied with z-poxy over raw balsa.   Light sanding with 400 then 2 coats of ModPodge (can't use anything that smells) sanded down to the CF then 2 more coats to seal sanded with 600. From here I will go to color which has to be brushed.  Does anybody have a better idea?  The key is NO SMELL and Spray is out as well given where I have to do it.

Plan "B" is to use MonoKote after the CF with no coats over it but I am reluctant to do 100 MonoKote.  Getting it to stick well and be smooth on convex curves is not easy, but I have done 3 full size planes in 100% MonoKote so I am not afraid to do it again, I just don't want to.

This is the fuselage in question.  I want to have it ready for the Gieseke Memorial in June.

Ken
AMA 15382
If it is not broke you are not trying hard enough.
USAF 1968-1974 TAC

Offline kevin king

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Re: Brush On Finish - Not by Choice
« Reply #1 on: February 18, 2023, 11:23:01 PM »
That's a unique looking plane.  H^^ The no smell paint may be a stretch.  have you looked into EZ Dope? latex?

Offline Tim Wescott

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Re: Brush On Finish - Not by Choice
« Reply #2 on: February 19, 2023, 09:50:19 AM »
Can you sneak out into the back yard and paint with spray-bombs?

I have, in the past, had good luck with using Minwax Polycrylic as a prep coat, and then Rustoleum Gloss Protective Enamel as a top coat.  It's not no-smell, but it's definitely low-smell; you may be able to paint it outside and then sneak it in after an hour or so.

I've certainly had old-timers insist that you can get a fine finish in dope by brushing it on, you just need to be more patient during the sanding phase.  I'm willing to believe that, but since sanding is the worst phase for me even with spray-on coatings, I haven't exactly jumped on the chance to try it.
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The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Offline Ken Culbertson

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Re: Brush On Finish - Not by Choice
« Reply #3 on: February 19, 2023, 11:59:03 AM »
Can you sneak out into the back yard and paint with spray-bombs?

I have, in the past, had good luck with using Minwax Polycrylic as a prep coat, and then Rustoleum Gloss Protective Enamel as a top coat.  It's not no-smell, but it's definitely low-smell; you may be able to paint it outside and then sneak it in after an hour or so.

I've certainly had old-timers insist that you can get a fine finish in dope by brushing it on, you just need to be more patient during the sanding phase.  I'm willing to believe that, but since sanding is the worst phase for me even with spray-on coatings, I haven't exactly jumped on the chance to try it.
I have done both.  "Back in the Day" red and white AeroGloss were very transparent, especially red.  I used to skip the clear altogether and brush color with a thick camel hair brush till nothing showed through.  It took years to learn how to do it without any brush marks.  Wet sanding after each coat, about 10 then rubbed out with rubbing compound and polishing compound.  What I used is no longer available and the new stuff sucks.  Once waxed it was just as pretty as today's spray on finishes.  But that was then.  Nobody would go through that much torture in today's instant finish world.  I have been convinced to go 100% monokote and get some matching automotive paint for the fillets.  Wish I could go out but there is no where to go out to in my office.  Thanks for the tips!

Ken
AMA 15382
If it is not broke you are not trying hard enough.
USAF 1968-1974 TAC

Offline Tim Wescott

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Re: Brush On Finish - Not by Choice
« Reply #4 on: February 19, 2023, 06:00:06 PM »
Back when I was a member of an RC club we had one builder who would occasionally show up at the field and brush dope on it while chatting with the rest of us.
AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Offline Matt Colan

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Re: Brush On Finish - Not by Choice
« Reply #5 on: February 19, 2023, 07:56:40 PM »
Why not just z-poxy the fuselage? Joe Daly wrote an article in Model Aviation a couple years ago showing how to paint with klasskote. That Bear I built was 3 coats of z-poxy and sanded between each coat and the finish turned out good, and not very heavy until I sprayed that horrid yellow on

Edit: that doesn’t help your paint problem though
Matt Colan

Offline Ken Culbertson

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Re: Brush On Finish - Not by Choice
« Reply #6 on: February 19, 2023, 09:14:16 PM »
Why not just z-poxy the fuselage? Joe Daly wrote an article in Model Aviation a couple years ago showing how to paint with klasskote. That Bear I built was 3 coats of z-poxy and sanded between each coat and the finish turned out good, and not very heavy until I sprayed that horrid yellow on

Edit: that doesn’t help your paint problem though
Z-Poxy doesn't foul the air as much as dope and rattle can and you can brush it on. I may go that route.  Either that or MonoKote.  Red MonoKote is easier to use than white and doesn't go all see through when you stretch it over curves.  My current thoughts, which may change tomorrow, are to MonoKote it and get it in the air.  If the Canard turns out to be a turd it will be an easy fix to take it off and refinish the fuselage.  And - YES - the yellow was horrid.
AMA 15382
If it is not broke you are not trying hard enough.
USAF 1968-1974 TAC


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