dp90 question

[Killer]

can dp90 be applied over a laquer based primer??

TIA

[56coroner]

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

[Roothawg]

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.

[Killer]

thanks, I figured it out.

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

[48stude]

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 http://www.jalopyjournal.com/ubbthreads/images/graemlins/frown.gif Bill

[Paul]

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

[Roothawg]

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

[flatshoebox]

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.

[48stude]

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 http://www.jalopyjournal.com/ubbthreads/images/graemlins/tongue.gif Bill