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Old 06-15-2004, 06:15 PM
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Dupoint Primer Under Bc/CC?

can i do this because the guy painting my car told me to use this cheap dupoint primer its like 8$ a quart at the autoparts store and the car is all done now ready to be painted i just wanted to make sure i could do this ive heard some bad things about it starting to regret it.....will it work though? for how long?

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Old 06-15-2004, 06:20 PM
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It will work but the best thing you can do at this point is spray a coat of epoxy over that lacquer primer.
It won't be a cure all but put the odds 80% in your favor instead of 20%.

We don't know how long it will last, but the epoxy will give a good barrier coat and help SOME. This is a situation where a urethane sealer over the lacquer would be the worst thing you can do. (in case the painter suggests that)

As I thought about this, Here is what to do.
Spray one wet coat of epoxy and let set over night.
Next day take some 400-1000 grit paper wet and hit any trash or nubs. than spray your base. My theory here is instead of basing over the epoxy in 30-60 minutes let all the solvents get out for adhesion down the road.

Last edited by BarryK; 06-15-2004 at 06:35 PM.
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Old 06-15-2004, 07:43 PM
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ty much for your thoughts from what ive read you know alot about this so ill get some of that and spray it before havn the painter work on it
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Old 06-16-2004, 10:15 PM
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Ive been getting a LOT of mixed opinions on this topic by some experienced painters!

Some say AU over lacquer will never work others say it cld work. Just from what Ive been reading here n there it seems to me that the biggest fear is the AU will possibly soften the lacquer, BarryK is that accurate?

If it is, someone from another forum advised me to try sealing it as stated above with expoxy primer but he said to just dust it on slowly, letting flash in atleast dbl the recommended time once completely covered give it a good med-wet coat.

I think what BarryK said to let it sit overnight wld make some sense too giving it time to gas off and possibly harden the lacquer also if it softened.

Ive been wanting to repaint my f/g motorcycle fairings for well over a month but the fact that its got a coat of lacquer paint and me not having the time to strip it off has slowed my progress down big time!
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Old 06-17-2004, 04:36 AM
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Quote:
Originally posted by sportbikeluvr
Ive been getting a LOT of mixed opinions on this topic by some experienced painters!

"Some say AU over lacquer will never work others say it cld work. Just from what Ive been reading here n there it seems to me that the biggest fear is the AU will possibly soften the lacquer, BarryK is that accurate?"

Yes that is one of the major problems. if you think about it you can spray lacquer primer let it set a week and wash off with lacquer thinner. What do you think the urethane reducers in base are doing.
************************************************** *8
"If it is, someone from another forum advised me to try sealing it as stated above with epoxy primer but he said to just dust it on slowly, letting flash in at least dbl the recommended time once completely covered give it a good med-wet coat."

The solvents in epoxies will not attack the lacquer, the dust coat was not necessary.
************************************************** *

"I think what BarryK said to let it sit overnight would make some sense too giving it time to gas off and possibly harden the lacquer also if it softened."

You can coat epoxy in 30 -60 minutes in most cases, the reason i
came up with the overnight statement was an overkill but I felt if all the epoxy solvents were gone and not setting on the lacquer it would give him more a chance for long term staying together.
************************************************
Ive been wanting to repaint my f/g motorcycle fairings for well over a month but the fact that its got a coat of lacquer paint and me not having the time to strip it off has slowed my progress down big time!
If only reason you want to repaint is because of our BS don't do it.
It may last 10 years or may fall off in 6 months-- thats the problem
no one can predict and it does not always fail.
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