dp90 question

can dp90 be applied over a laquer based primer??

TIA

 

yes, just scuff it really good..... scotchbrite, or wetsand it.

 

Dude, lacquer based primer never stops shrinking. It won't peel or flake or anything like that but if this car you speak of ever intends on having paint I would sand it all off....IMO.

 

thanks, I figured it out.

It's not laquer based, just uses laquer thinner to thin it??? Sorry, I'm not a painter...

 

Killer , Any time you use a solvent to reduce or thin your paint or primer, it can take up to a couple years or longer to completely evaporate, thus creating the shrinkage. When you use a urethane or epoxy paint that more or less sets instead of dries, over a solvent , you will trap the unevaporated solvents and will cause all these blisters appear where the solvents are trying to escape. This process can take years to manifest itself. I learnt this from experience unfortunatly Bill

 

how about reducing the DP90 with laquer thinner when used as a sealer?

isn't that in their directions?

I used DP90 over the bare metal on my coupe, then filler and a couple coats of urethane primer surfacer over that and just bought more DP90 to seal it all up before top coats.

it has been months between the various layers and I may not get finish coats on for months more so I don't want to leave the urethane exposed too long.

It will be driven.

Paul

 

I believe that DT series is more along the lines of enamel reducers, when being sprayed as a sealer.

 

I have found answers to any PPG paint question at there website. Look under the products MSDS or "cutsheet".
I print them and keep them handy..
Did you know you can reclear up to 3 days later on some clears with out sanding...comes in handy for big flake jobs.

 

Whoops , I've got to eat some crow here, After refering to PPG's product information book , It says you can use DP-LF over lacquer products if you topcoat it the same day you spray it otherwise it will lift , but if you need to reduce it, only use their DT reducers. Also I noticed that you could spray their urethane K-200 (which they don't make anymore) over lacquer paints. But my experience with both of these situations has led to problems .
This just goes to show you, sometimes I don't know what the hell I'm talking about Bill