sig and brodak

[steve pagano]

Is sig thinner compatable with brodak dope?

[peabody]

Steve....lots of problems have stemmed directly from using the wrong thinner...
Contact Windy or Jose.....they'll be happy to help.

[frank carlisle]

be safe Steve. Use Brodak thinner with Brodak dope. Use Sig thinner with Sig dope.

Probably you can mix the two brands without any problems coming up but I personally figure that I'd as soon stay with same label dope products. It takes away that risk.

[George]

Is sig thinner compatable with brodak dope?

Brodak dope dries faster than SIG. From what I understand, this is mostly due to the thinner used. For that reason, you can apply SIG over Brodak but not the other way around...UNLESS you let the SIG dry well and gas-off.

The problem with Brodak immediately over SIG is that the Brodak will dry while the SIG is still gassing-off and the gas will lift the dried Brodak off.

You could probably do it if you let the mixture completely dry before switching to another paint.

Some guys on here really know their stuff and can mix appropriate Dupont (and other) thinners in with a desired result. I'm not one of those guys so I stick with a brand throughout the finishing process.

I clean my equipment (usually brushes) with cheap lacquer thinner. Still, I do a final rinse in the thinner used with the dope brand. Is this the best way? Don't know, but it works.

I think, as others have mentioned, unless you REALLY know what you are doing...stick with one brand.

George

[Bootlegger]

 Something that I have done when trying different thinners in dopes is mix a 1oz mixture of each, then if it doesn't work you haven't lost a lot...

[dennis lipsett]

Don't thin Sig with Brodak thinner, it will turn to jelly. Tried a test to see what it would do awhile back.
Dennis

[Paul Smith]

Sig and Brodak.

2 days vs 5.
Free dinner either way.
Motels about 8 miles away.
Full price store vs 10% discount.

[Dennis Moritz]

I used Brodak clear to prep profile fuse and stick on silkspan. Used Brodak sanding sealer on top of that. Dried for a few days. Put Sig polar gray on to even out undercoat and provide base for Brodak color. Put on Brodak color after a few days. Sig and Brodak clear on top of that. Why? It was the stuff on the shelf in my workshop and can only buy Sig at the local hobby shop. The tariff on dope sent through the mail is RIDICULOUS. Everything seems fine. The extended drying time between changing brands was just dumb luck. As for the Brodak thinners, often I add a dash or two of retarder to avoid orange peel. Test spray and see how the humidity and temperature conspire on a given day. Piling my planes on top of each other, having them rub in my car (very bad idea, using foam now  to avoid this problem) wore off color in places, wore it down to the Polar Gray. I've touched up planes here and there. Sprayed various brands of clear on top of that. Seems fine. Again, allowing time to dry between switching brands.

[John Paris]

Sig and Brodak.

2 days vs 5.
Free dinner either way.
Motels about 8 miles away.
Full price store vs 10% discount.

Paul,
All true up to the last line.  Sig offers a good discount (more than 10%) on their products during the contest and often have specials available at their on-site hobby trailer.  Swing by this year and experience it first hand.
John

[Paul Smith]

Could be true, the only time I entered these the Brodak store gave contestants 10% (or maybe 15?) off and the Sig was getting full list price.   

I sort of expected "factory outlet" pricing, but overall, both contests were great.  Providing the field counts for something.

[RC Storick]

Paul,
All true up to the last line.  Sig offers a good discount (more than 10%) on their products during the contest and often have specials available at their on-site hobby trailer.  Swing by this year and experience it first hand.
John

I buy 2 gallons of SIG clear every year when I go up there. I also haul back cases of fuel as to avoid the hazmat costs.

[Bill Little]

Well I'm the "blind hog that grubs up an acorn every now and then".  That's well known!

I have never used Brodak or Sig thinner in either one.  I use Dupont 3608S in both.  None of the other suffixs will do.  The Dupont 3608S is an automotive acrylic lacquer thinner.  Aircraft dope is a "lacquer based" paint.
I also use the Dupont "flex additive" and "fish eye" killer in all my dope products.  I used a PPG thinner when the store was out of stock on the Dupont, but it was "too hot" and "melted" the color coat undet the clear on the bottom of a lpane I was doing.  Admittedly, I got it a *little* too heavy.  Retarder seems to act the same way if you add too much.  Did that too.  Didn't show up as a problem until I started masking and the paint pulled up to the bare silkspan.  It ate all the way through the color and substrate!

Not saying that it will work 100% of the time, but it works for me.  Seems the common thinner is the key.  If you try it, do a sample first.  IIRC, a gallon of 3608S is about $22-$25 for me.  I'm cheap.

I would not try to mix the two brands of thinner (Sig/Brodak) in each other.

Bill <><

[steve pagano]

what's Dupont "flex additive" and "fish eye" killer ?