 Editor in Chief Bill   | 20 May 2019 1:13 p.m. PST |
I've heard of this, but never had a case of it before until today. This morning, I gave some finished models their Dullcote spray. When I checked on them this afternoon, they were milky white! The dreaded 'frosting' condition. Probably due to the humidity? (I should have taken a pic!) I remembered the cure, and Dullcoted them again. The colors reappeared like magic. Now let's hope it dries that way!  |
| Col Durnford | 20 May 2019 1:32 p.m. PST |
I thought the cure was to spray again with gloss before the dullcoat. |
| Editor in Chief Bill | 20 May 2019 1:38 p.m. PST |
I believe it has something to do with the talc that makes Dullcote 'dull' floating to the surface of the paint, so spraying again solves the problem. |
| rustymusket | 20 May 2019 3:31 p.m. PST |
Yes, been there before I knew the cure was re-spraying. Glad you remembered. |
| Editor in Chief Bill | 20 May 2019 3:49 p.m. PST |
Well, the 2nd Dullcote has now dried, and the models are still somewhat frosted. So I've tried a gloss coat, will wait and see… |
| Mr Jones | 20 May 2019 3:56 p.m. PST |
I had this happen years ago using Humbrol varnish, but a second coat did the trick. Nervous moments though, waiting to see if it works! |
 etotheipi  | 20 May 2019 4:29 p.m. PST |
The spray paint has a small amount of solvent in it. Spraying again lightly "dissolves" the outer coat of sealant, which is how it "fixes" various sealant problems. Lightly "emulsifying" the paint is how sealant sticks. Words in quotes were used as general terms by my dad, who was a chemical engineer and understood such things. |
| Mirosav | 20 May 2019 7:37 p.m. PST |
A coat of brush-on gloss will remove the frosting. You can dullcote them again after it dries. |
| Editor in Chief Bill | 20 May 2019 7:54 p.m. PST |
The clearcoat fixed some of the problem, but seems to have sealed in the rest of the problem. So I am repainting in salvage mode.  The can of paint is on the suspect list! |
| Zephyr1 | 20 May 2019 8:58 p.m. PST |
Easiest fix is to dab the frosted areas with a cotton swab dampened in mineral spirits. It dissolves the frost & evaporates before harming the paint job. Let dry for a day before reapplying varnish, etc… |
| Editor in Chief Bill | 20 May 2019 9:35 p.m. PST |
I have a bad feeling the clear coat and Dullcote weren't fully compatible with each other… |
| lkmjbc3 | 21 May 2019 5:29 a.m. PST |
It happens all the time to me. A good gloss coat will fix the issue. I've gone to brush on matte in the Summer and Fall. Joe Collins |
| freerangeegg | 21 May 2019 12:22 p.m. PST |
My go to fix for this now is something a friend recommended which sounds mad but works like a charm, give the offending model a light brushing of olive oil. It gets rid of the greying instantly, but will look shiny for a couple of days until the oil evaporates away. At which point the model dries to a lovely clear Matt. I don't know why it works but it definitely does. |
robert piepenbrink  | 21 May 2019 4:09 p.m. PST |
Finally, a use for olive oil! A friend of mine has been trying to use the stuff for cooking. She's Greek, of course, but there are things even that does not excuse. (Just kidding. Actually, I always keep a bottle of olive oil on hand--for polishing coins.) |
 Yellow Admiral | 21 May 2019 4:27 p.m. PST |
Has anyone tried to use Future to re-clear a frosted dullcoat? Future partially defogged some clear 1/144 scale canopies that got frosted by a bad glosscoat, so it *might* work. One of the nice things about Future is that if it doesn't work, it can be removed with ammonia. - Ix |
| etotheipi | 22 May 2019 6:25 a.m. PST |
How has this turned out for you? |
| Bowman | 22 May 2019 12:29 p.m. PST |
It gets rid of the greying instantly, but will look shiny for a couple of days until the oil evaporates away. At which point the model dries to a lovely clear Matt. I don't know why it works but it definitely does. The oil won't evaporate, the moisture content of the oil will evaporate. Olive oil, if left long enough, will go rancid. |
 Doctor X | 23 May 2019 12:02 p.m. PST |
Olive oil, if left long enough, will go rancid. This |
| freerangeegg | 23 May 2019 12:22 p.m. PST |
Bowman, I didn't suggest storing them in it. Just give the model/figures a VERY light coating with a brush dipped in the olive oil. It dries off the model in a few days leaving a nice matt finish.
Here are some T64s which came out very grey after a matt spray varnishing on a damp morning, after the oil has dried/ evaporated away.
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