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So as said before, I had some models that have cracked chaos Black Primer right after I primed in the cold. I tried leaving the models in simple green for around a week and the primer still stuck on. I was then recommended to use Isopropyl Alcohol and I bought a 70% solution from the drug store and left the models in there for a day. I was told I could get results as fast as a few hours, but after a day the primer is still on the models after I took them out for scrubbing with an old toothbrush.

Is there anything I may be doing wrong? Like I made sure for the alcohol not to touch any water because I heard it dilutes it. Does the alcohol need to be warmed or something? Am I maybe not scrubbing hard enough? Is cracked primer just impossible to remove or should I just get a non acetone nail polish remover?

Thank you.

If this does not work I will go for non acetone nail polish remover and if that does not work I will try my best to maybe paint over it, but it could look sloppy.

Generally, 99% iso will get you the fastest results, so it will take longer in 70% - that said, after 24 hours I'd expect something.

You will get the best results if you scrub it in the iso, as it will evaporate fast and reconnect the paint to the model.

If you get no joy from it after another hour and a submerged scrub, go for Dot3 brake fluid - it eats everything.

(don't touch it, dispose of it properly (not down the sink!))

Use a toothbrush, it will remove the loosened primer

SaintofDaemons wrote:
Use a toothbrush, it will remove the loosened primer

That is what I did, but no luck.


Automatically Appended Next Post:

kb_lock wrote:
Generally, 99% iso will get you the fastest results, so it will take longer in 70% - that said, after 24 hours I'd expect something.

You will get the best results if you scrub it in the iso, as it will evaporate fast and reconnect the paint to the model.

If you get no joy from it after another hour and a submerged scrub, go for Dot3 brake fluid - it eats everything.

(don't touch it, dispose of it properly (not down the sink!))

Hmmm. I do seem to hesitate when I take it out the tub and leave the tip open when I start scrubbing (for the record I use a closed plastic bin when not scrubbing to keep them in). Thoughts?

a few seconds is no big deal, but a minute will be

kb_lock wrote:
a few seconds is no big deal, but a minute will be

So it's best to just scrub when the model is inside the tub in the liquid?

If you can, absolutely - wear gloves though as it will dry your hands out

kb_lock wrote:
If you can, absolutely - wear gloves though as it will dry your hands out

Got it. I'll try in an hour or so. If not, it's non acetone nail polish has a last resort.

Brake fluid would be worth trying if your nail polish doesn't work

Are your models metal? If so, then you can use anything on it, like nail polish remover (which would melt plastics and such)

 heartserenade wrote:
Are your models metal? If so, then you can use anything on it, like nail polish remover (which would melt plastics and such)

Nope. Just plastic with cracked primer. I've had no luck recently with simple green and the alcohol. So I'll give it another shot soon. If it fails, non acetone nail polish remover will be my 3rd bet.


Automatically Appended Next Post:

kb_lock wrote:
If you can, absolutely - wear gloves though as it will dry your hands out

Ugh, bad news. I tried scrubbing again while the models were submerged and absolutely nothing happened. This is getting ridiculous. Is it possible that primer in the new chaos black just does not ever come off? Otherwise, it still feels like I'm doing something wrong. Maybe I need to wait another day?

I've heard that it's not worth using anything under 91% for iso alcohol as it's too diluted for stripping regardless how long you leave it in =(
I'd suggest trying a higher strength one =)

 Fieora wrote:
I've heard that it's not worth using anything under 91% for iso alcohol as it's too diluted for stripping regardless how long you leave it in =(
I'd suggest trying a higher strength one =)

Will try that tomorrow I guess.

Rattle-can Primers will stain plastic. White primer, too.

IPO will remove most of the gak but not much you can do about the stained plastic.

 Kr00gZ wrote:
Rattle-can Primers will stain plastic. White primer, too.

IPO will remove most of the gak but not much you can do about the stained plastic.

It's not the stain I'm worried about, it's just the priming gak itself.


Automatically Appended Next Post:

 Fieora wrote:
I've heard that it's not worth using anything under 91% for iso alcohol as it's too diluted for stripping regardless how long you leave it in =(
I'd suggest trying a higher strength one =)

Eh, I checked online, I seem to have a problem with finding a 90% solution in Toronto. I guess I may have to settle for nail polish remover.

Try Dettol antiseptic disinfectant liquid. I have removed many black primer coats with that. 24 hours is more than enough.

I remember someone complaining somewhere that simple green uses different formulas in different countries.

http://www.amazon.Com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=dettol&rh=i%3Aaps%2Ck%3Adettol

The only reason to use Dettol is if you like the smell, it is mainly isopropanol

Okay, I've tracked down this non acetone solution for nail polish remover in a Wal Mart. Will this help me solve my problems and if so, for how long should I leave the model in the solution?

http://www.walmart.ca/en/ip/equate-non-acetone-nail-polish-remover/6000110549614

Acetone free stuff should start working straight away; I've had totally clean models after an hour at most. As others have said scrub the models with a toothbrush whilst submerged. You will be left with a residue but it won't show up when you repaint them. Also,when the nail polish remover gets murky and you can't see through it,change it!

Slipstream wrote:
Acetone free stuff should start working straight away; I've had totally clean models after an hour at most. As others have said scrub the models with a toothbrush whilst submerged. You will be left with a residue but it won't show up when you repaint them. Also,when the nail polish remover gets murky and you can't see through it,change it!

So it's best to put it in a cup and do one model at a time and start IMMEDIATELY while it's submerged (or do I wait like 30 seconds) I also take it that I need to wear gloves?

This is how I do it;

1) Get some plastic tubs with lids/the kind you get for storing food in the freezer or from fast food places.
2) The bigger tub the better! Put as many minis as you wish/can put in the container. Pour in as much acetone free nail varnish remover as possible;the more minis the less you'll use.

3) Stir (gently to avoid splashes!) the minis to ensure that all get soaked in the liquid. Put the lid on and forget for about ten minutes.

4) After ten minutes,put gloves on and grab an old toothbrush or a hard bristled wedge shaped paint brush and while submerged just drag it over the minis. This helps agitate the paint into moving.You'll find some paint comes off quicker than others so concentrate on those minis first.

5) By this stage you should have minis that are reasonably clear of paint so grab them out and use kitchen towel/roll to wipe them down. Work fast to remove any sludge/pull away with the towel rather than wipe otherwise it will smear the paint back on.

6)Some colours will put up a fight,so just leave them a bit longer. It IS possible to remove even primer but you need to keep them submerged and really work at them.

7)If the solution gets too sludgy, empty it (responsibly!)and use new stuff.

8) If it has all went to plan you should have reasonably clean models/OR models slightly stained (ghost of primer). You can actually remove this when the models are dry by gently scraping it off with a scalpel.To be honest I can't say this residue causes any problems when it comes to repainting,if anything it adds a little preshading!

Hopefully this will help,any questions just ask.
P.s. I stripped 300 marines(yes that is correct) in two days with this method!
I had a lie down afterwards....

Slipstream wrote:
This is how I do it;

1) Get some plastic tubs with lids/the kind you get for storing food in the freezer or from fast food places.
2) The bigger tub the better! Put as many minis as you wish/can put in the container. Pour in as much acetone free nail varnish remover as possible;the more minis the less you'll use.

3) Stir (gently to avoid splashes!) the minis to ensure that all get soaked in the liquid. Put the lid on and forget for about ten minutes.

4) After ten minutes,put gloves on and grab an old toothbrush or a hard bristled wedge shaped paint brush and while submerged just drag it over the minis. This helps agitate the paint into moving.You'll find some paint comes off quicker than others so concentrate on those minis first.

5) By this stage you should have minis that are reasonably clear of paint so grab them out and use kitchen towel/roll to wipe them down. Work fast to remove any sludge/pull away with the towel rather than wipe otherwise it will smear the paint back on.

6)Some colours will put up a fight,so just leave them a bit longer. It IS possible to remove even primer but you need to keep them submerged and really work at them.

7)If the solution gets too sludgy, empty it (responsibly!)and use new stuff.

8) If it has all went to plan you should have reasonably clean models/OR models slightly stained (ghost of primer). You can actually remove this when the models are dry by gently scraping it off with a scalpel.To be honest I can't say this residue causes any problems when it comes to repainting,if anything it adds a little preshading!

Hopefully this will help,any questions just ask.
P.s. I stripped 300 marines(yes that is correct) in two days with this method!
I had a lie down afterwards....

Thanks chum! I'll give this method a go as soon as I get to Walmart (whenever that is lol)