Removed clearcoat

[sproulman]

i sprayed my fender with dupli clearcoat in can.i let it dry for 2 weeks.
it did not shine very good so i read to use rubbing compound on it.

so, i bought MEGUIARS ULTIMATE COMPOUND.i put it on lightly and barely rubbed it and all my clearcoat came off.
i was not happy .
could this stuff have something in it that removes newly painted clearcoat in can?
i think can said it was lacquer type clearcoat from dupli-color.

could it be petroleum distattates in ultimate compound removed the clearcoat?
i have use ultimaTE on my factory clearcoat and it worked fine but on my can spray clearcoat it took it off fast.
also what would you use to get shine and not remove the clearcoat in a can ?

thanks

[Blueline]

Re: Removed clearcoat

I think you need to wait longer than two weeks for that stuff to fully harden.

[Ryansworld]

Re: Removed clearcoat

yeah i don't think two weeks is long enough

[sproulman]

Re: Removed clearcoat

ok, maybe let it dry for month or so.

i thought it might be the PETROLEUM DISTILLATES that is in the UC that caused it.
this DUPLICOLOR paint in can is lacquer .

i have read to lightly sand this stuff with 2000 wet paper then polish it and glaze it.
i was shocked how fast the clearcoat came off.it seemed hard before i used the UC.

[04blkpearlcoupe]

Re: Removed clearcoat

Did you first sand the area before you sprayed on the clear? If you sprayed over glossy paint the clearcoat won't stick. You need to prep the paint with 1,500 or 2,000 grit sandpaper first.

[Michael Stoops]

Re: Removed clearcoat

How much clear did you apply? Did you, as has been asked, prep the paint below to accept the clear or did you shoot it over glossy paint or otherwise un-prepped paint?

What caused this clear to come off is a combination of prep, thickness of the new clear, level of curing, and the fact that UC is a fairly aggressive abrasive (not because of any petroleum distillate or anything else in it). Something else is going on here as this product has been used by enthusiasts for just this purpose many times, and the product it's derived from, M105 (which is far more aggressive) is used by body shops on fresh paint all the time.


Oh, and just so you know, we saw your other posts about this in other threads, including one that had nothing to do with this product. Let's keep this discussion here and not in multiple places on the forum. We understand your frustration here, but it's a lot easier to assist when all the information is contained in a single thread.

[sproulman]

Re: Removed clearcoat

duplicolor said,not necessary to sand the basecoat before using lacquer clear,wait 30 minutes for basecoat to dry then use clearcoat.maybe if you waited a week or 2,then you sand. i did read that but not if you applied the clear 30 minutes later.

so, no i did not sand basecoat per instructions using lacquer.
most i talked to did not sand basecoat as it will leave scratchs in basecoat paint before clearcoating.
i know the clearcoat was hard to my fingernail before i used UC .
i did put on 3 coats of clear per instructions on can.

[Michael Stoops]

Re: Removed clearcoat

OK, so you shot the base coat too, good. It looks like some where thinking that you may have shot the clear over existing factory paint - we were just looking for clarification.

I can tell you from personal experience, although not using Duplicolor specifically, I've prepped a piece and then shot color and later clear, both rattle cans, and a couple of weeks later wet sanded with 2000 grit and then rotary applied M105 and didn't take off the clear. And that's a far more aggressive process than what you describe you did. It does sound like the clear hadn't fully cured yet, but honestly, it's a bit tricky to say with absolute certainty just what did go wrong here. But nothing in the UC would dissolve or break down the clear, it's just the abrasives that would level down sanding marks, etc.

[sproulman]

Re: Removed clearcoat

going to let it sit for at least month.i also sent PM to dupli-color.
some of other forums say the can clear is very soft with hardner not in it and you have to be careful with it as you can sand it off .

i believe the UC did take it off because i had a section that i did not use it on that still was fine .maybe sanding did take some of the clear off then UC removed the rest.

i agree, maybe i need to wait a month or so to do anything to it.they said not to wax it for month or so .

[04blkpearlcoupe]

Re: Removed clearcoat

I just watched the video on how to apply the clear coat at Dupli-Color's website because I will be touching up some spots on my own car and the guy said that sanding and buffing will take off 2 to 3 coats so you have to put at least 4 or 5 coats on there. They said they were going to do 6 just to be sure.

http://duplicolor.com/duplicolor-weblogic/projects/project/paintShopClearCoat/

[sproulman]

Re: Removed clearcoat

I just watched the video on how to apply the clear coat at Dupli-Color's website because I will be touching up some spots on my own car and the guy said that sanding and buffing will take off 2 to 3 coats so you have to put at least 4 or 5 coats on there. They said they were going to do 6 just to be sure.

http://duplicolor.com/duplicolor-web...ShopClearCoat/

that pic is dupli-color in can that you use in spray gun.info on the small cans of aerasol spray say 3 COATS.
i think that stuff has hardener mixed in it. dont know if its same as small cans we buy at adavance auto.i dont think so.
they have video also there on how to use small cans of spray using PRIMER,BASECOAT,CLEARCOAT.

but they dont show any buffing or sanding in video at all.

i am going to wait 30 days or more then try wet sand a little. maybe this stuff is just not thick enough with 3 coats to sand or it was not fully cured.
thanks for info .i do have e-mail into dupli-color also and most here figure it was not cured.

[Michael Stoops]

Re: Removed clearcoat

.maybe sanding did take some of the clear off then UC removed the rest.

Without a doubt. Sanding is far more aggressive than compounding and will definitely remove more material. What grit sandpaper did you use, did you sand by hand or with a DA sander (hand sanding, oddly enough, is the more aggressive of the two), and did you wet or dry sand?

[sproulman]

Re: Removed clearcoat

Without a doubt. Sanding is far more aggressive than compounding and will definitely remove more material. What grit sandpaper did you use, did you sand by hand or with a DA sander (hand sanding, oddly enough, is the more aggressive of the two), and did you wet or dry sand?

mike, thanks for help and everyone else too.i used 2500 wet sand paper.i sanded by hand.i did not rub hard ,very lightly and not very long.
then i took UC and put it on and saw my clearcoat was gone.
maybe sanding took it off.

can says,USE A MILD POLISH.other sites said the can acrylic lacquer is very soft.cant take much sanding.with 3 coats, maybe it came off.
dont know.

do you think maybe this time dont use any sandpaper ?

maybe just mild polish?

[juliom2]

Re: Removed clearcoat

BTW and just to mention......If the plan is working with spray cans, you could consider the following
some auto paint supplies mix and sell the paint you need in spray cans for a reasonable price.....
Spraying on good material will show on the end result.....

[sproulman]

Re: Removed clearcoat

have to correct my info.ULITMATE COMPOUND did not remove my acrylic lacquer.
i have idea it was 2500 wet sandpaper.
3 coats of dulpi-color must have been just to thin for sanding.

i took this time and waited about 2 weeks to dry.i then skipped sanding all together and just used UC.
it came out beautiful.then followed up with FILL N GLAZE .real nice.
i did not wax as i am going to let it sit for 2 more weeks but shine is great.

SO, BAD INFO ON MY PART THAT UC REMOVED MY CLEARCOAT.