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Unread 05-14-2013, 11:36 AM   #1
g2tiger
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applying monstaliner to fender flairs question

Hello all,

I am preparing to monstaliner my TJ interrior. I was thinkning I might have enough left over to do the factoty fender flairs. I purchased 1 gallon of the black the other day since it was the recommended ammount. The fender flairs have been previously painted and are peeling/spot peeling.

My questions are as follows:
Should I scrub the old paint off? and with what? sand paper? or something else?
How should I prep the fender flairs? Is there a primer? is using primer recommended or will Monsta liner stick to the plastic? the product description makes it sod like it will bond to the flairs directly.

by the way, I am waiting for Monstaliner to respond to these questions but I wanted to also touch base with anyoe who might have experience with doing this to the fender flairs. I have searched the threads but continue to find only info on applying monsta liner and other such products to the metals components and body of the Jeeps.

Thanks in advance

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Unread 05-16-2013, 10:12 AM   #2
Ironworker709
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You will need to try and rid of any old coatings on the flares..if not and the old coating is cheap or improperly applied it will cause anythng on top of it to come off later.

get some 220 grit sand paper....and a can of adhesion Promoter

throughly wash the flares with some heavy duty grease cutter dish detergent like Dawn in as hot a water you can stand ...scrub throughly to rid any any dirt,oils or old coatings like ArmorAll that may have been put on it

Then soak a rag sparingly with acetone and start wiping down the flares,dont let them soak long or you could actualy melt the plastic,the rag needs to be "just wet"..not dripping wet....wipe several times to remove any old coatings...

Then for a bonding insurance and making sure your workin with a fresh sirface give it all a good hand sand with 220 grit sand paper,or even scotchbrite pads...

Do another wipe down with acetone......then spray the adhesion promoter according to it's instructions and then apply the bedliner.

Do NOT skip the adhesion promoter............
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Unread 05-16-2013, 02:42 PM   #3
g2tiger
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Iron worker,

Thanks for the info. I'll check in at Home Depot for adhesion promoter. I have to get some MEK so I can look for that as well. You said what I was thinking but I was not aware of adhesion promoter. Any thougts on the seam sealer asapplied by the factory and putting the liner over that? I guess need to give Monstaliner a call tomorrow before I start and get his thougths.
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Unread 07-02-2013, 09:04 AM   #4
Therios
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Did you find this "adhesion promoter" and, if you did, where?
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Unread 07-02-2013, 10:31 AM   #5
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Quote:
Originally Posted by Therios View Post
Did you find this "adhesion promoter" and, if you did, where?
Any auto parts stores..walmart..auto body suppliers..etc will have it..in spray can under Adhesion Promoter...

They are usualy in any auto body sections or paint sections
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Unread 07-02-2013, 10:37 AM   #6
S8NNG8
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Wont the liner crack like bondo on flexible surfaces?
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Unread 07-02-2013, 02:04 PM   #7
Ironworker709
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Quote:
Originally Posted by S8NNG8 View Post
Wont the liner crack like bondo on flexible surfaces?
No...they sent me a bunch of color samples to check out the different colors they have..they are on some kind of little flexible bourd....you can twist and felx all you want and never cracks or peels...
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Unread 07-17-2014, 08:03 AM   #8
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Ok, It's been awhile and I will let you know who the Monsta liner held to the fenders flares. first let me tell you I got started and failed to get the adhesion promoter. So all bets were off. I realized I had forgot the promoter (I did find the stuff at the local parts stores etc but did not pick it up for some reason, probably was not sure when I was going to do the project).

anyway, I started the inside when I got a clear weekend and had just started the first coat inside when I realized I got ahead of my self and did not prep the fender flares. At this point I could not stop and run to the store. I Jeeped on. What I did instead was clean the fender flares with Acetone then scuff them and clean them again. This has worked well for the time being. then I added some coil spring spacers and my helper and I ended up grabbing the flares as we worked and that action broke the Monsta liner away from the flare. It came off in flakes about the size of a quarter and still has some come off every now and then.

I can not comment on the adhesion promoter at this time. The look and feel are great but I will need to get new flares and some additional liner and this time adhesion promoter and go for it.
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Unread 10-31-2014, 01:41 PM   #9
g2tiger
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OK a report on the Monsta liner on the factory fender flares.
It holds ok until you bend the flare. BECUASE I did not put the adhesion paint on as I should have I think the Monsta liner did not hold as well as it cold have. One thing to remember is that the liner is not as flexible as the fender and the two will bend at different rates. so I have some areas with sections of liner missing. I used some touch up paint and its ok.

I guess new flares would be in order since one of them is damaged.
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Unread 10-31-2014, 02:53 PM   #10
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So, let me see if I understand what happened. Instead of taking sound advice from people who know, and not waiting until you got the adhesion promoter to do the job correctly, you went ahead anyway, and as a result, you wasted your time, the expensive Monstaliner, and made a mess of the parts. Hopefully, you learned something.

When I Monstalined my fender flares, I used Bulldog Adhesion Promoter, as recommended by Monstaliner. Worked out great.
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Unread 11-03-2014, 06:46 AM   #11
g2tiger
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Copperhead,

Wow, No worries on the expensive Monsta liner. The stuff was intended fro the inside of the jeep and the application to the fenders was simply a extra that was not planned to happen but only a plus if there was some left. I did not know how much would be used on the inside of the jeep. So the Fender flares were an extra item not planned but only desired.

After I completed the inside of the jeep I realized there was probably enough to do the fenders. Also, since you have used the Monsta liner you realize it has a limited use time. After completing the inside I simply made the decision to try the Monsta liner on the fenders to see how it would work.

the fenders were in need of some attention and it did not hurt anything. It would probably still be on completely if my assistant while doing a lift had not use the fenders to pull himself up bending the flares excessively.
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