I`m seeing many people use 845IW as a topper??????

[Deep Gloss Auto Salon]

I have seen quite a few threads in the past few months where people are using Colli 845IW as a topper.



I have always felt that due to the high chemical content (solvents?) that 845IW would remove much (most) of what it is being applied over.



I know I will not use it as a topper and I am hoping to get some opinions from those of you that have a good deal of experience with 845IW to potentially assist others from reducing their objective when they use 845IW as a topper...



Let`s talk.....

[Accumulator]

I use it as a "topper" over 476S, but I put it in scare-quotes because I let the 476S cure/whatever first, and don`t believe the 845 compromises it. It`s the "Collinite sandwich" approach of 845-476S-845 that simply works best for me (I then just refresh the 845 as needed for a long, long time).



I dunno about the 845`s solvents messing with previously-applied LSPs, but I guess there are a few variables there that might make all the diff.



But otherwise, yeah, I agree about it being questionable. Some people talk about topping KSG with 845, and IME/IMO it`s a lot better to just put on more KSG, unless there`s some big motivation to alter its look. The 845 won`t be more durable than more KSG or anything like that and will preclude adding more KSG later.



Other than my "Collinite sandwich", I`d say to just pick the right LSP for the application and use it all by itself.

[Leadfootluke]

Can you spit-shine 845 to neutralize some of the solvents to allow it to better "layer" without compromising the previous layers bond?

[Deep Gloss Auto Salon]

I use it as a "topper" over 476S, but I put it in scare-quotes because I let the 476S cure/whatever first,



And therein lies the huge caveat!!! Letting the 1st layer of whatever FULLY cure is the only way I see this as being a remotely viable process.



From what I can tell (read) from the threads I have read over the past few, it seems as though the users are doing it as a topper immediately after application of the 1st layer of whatever....



Thx for pointing that out.....

[Accumulator]

And therein lies the huge caveat!!! Letting the 1st layer of whatever FULLY cure is the only way I see this as being a remotely viable process.



From what I can tell (read) from the threads I have read over the past few, it seems as though the users are doing it as a topper immediately after application of the 1st layer of whatever....



That does get trickier..note that I`ve used 845 immediately after products that fill, including some of the Meguiar`s "Pure Polishes" (which I consider pretty fragile) and I`ve never had a problem with the 845 messing with them. I just recently did 845 immediately after 1Z WaxPolishSoft, and there was no sign of solvent effect, and on the panel in question it woulda been pretty obvious.



Not :argue or anything, just saying that it doesn`t cause issues for me, at least not that I can recall. But that sure doesn`t mean that it wouldn`t cause problems with some other underlying product(s) and when I do that Collinite sandwich I definitely wait at least a day between the layers unless it`s some weird situation where I just can`t do that.

[TroyScherer]

I have used #845 on top of a sealant for winter before... It has always been either Menz PowerLocl or Klasse SG.



Did #845 remove some of the MPL when I applied it maybe. I`m not really sure. But I have never had enough durability from MPL on its own to make it through the winter here. But when topped with #845 I have had no problems. Maybe I could have just used #845 but I choose to apply MPL 1st.



Klasse SG on the other hand is a totally different animal. KSG is a bullet proof LSP IMO.... I have chosen to top it in the winter for my own peace of mind but never needed to. I am confident that #845 has not removed any of my KSG during application.



How do I know? I guess I don`t really but when a car with MPL / #845 only takes 1 dawn wash to remove any sign of beading after winter and KSG / #845 takes 3 to get the job done; I am pretty sure the KSG is still there.



I do think your point is well made though. #845 on top of almost any beauty nuba will surely remove it. And IMO some of todays polymer sealants aren`t strong enough to resist #845 either.



Also I have always waited about a week to "top" and sealant with #845 as I want to ensure that everything has properly cured....

[imported_reeeko99]

I agree, the previous sealant needs to cure properly before applying 845.

I usually wait 24 hrs if I`m in a hurry or the following week otherwise between a layer of 476 and 845 or multiple coats either for that matter.

But the smell of solvent in 845 sure makes you think twice....

Good topic...

[Deep Gloss Auto Salon]

But the smell of solvent in 845 sure makes you think twice....





Yuuuuuppppp!!!