Underseal

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Underseal

Postby logsplitterman » Fri Jun 24, 2011 4:27 pm

Hi,
Can anyone give me some advice regarding underseal on the inside surfaces of the front wings of my HA Beagle? Whilst doing other jobs under the car i had noticed small areas of the underseal flaking off and thought one day i will scrape those bits, treat the rust, paint and underseal the affected areas. Anyway, today i had a go at it with a 1" wide scraper but to my dismay not only were the scabby bits coming off but large areas of the underseal was coming away quite easily revealing a film of rust underneath. Some parts were firmly fixed and would not budge with the scraper.The question is do i have to remove all the underseal including the solid areas, if so how, do i use a solvent to soften it, or what? The body has been resprayed so presumably a heatgun is out of the question. Is their a product such as Dinitrol or Waxoyl that would penitrate the solid sections of underseal and attack any rust that may be underneath or does it all have to come off down to bare metal and start again?
Any advice would be gratefuly appreciated.
Many thanks,
Alan Hughes.
St. Asaph.
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Re: Underseal

Postby vxmad » Fri Jun 24, 2011 5:10 pm

Hi I used cellulose thinners to all my cars, you must take care as it may femove the paint if you spill any on it, it would be best to remove all the underseal, you can then treat the affected area's, hope this helps. Steve
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Re: Underseal

Postby vivamike123 » Fri Jun 24, 2011 6:19 pm

yer ive used thinners in the past as well and for any thick areas get a rag soaked in thinners and put it on it and it will soon soften it up but dont leave it to long as it will take it down to bare metal good look :|
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Re: Underseal

Postby vauxhallbitz » Fri Jun 24, 2011 6:48 pm

I started a post on this in the Restoration section, might be of use to you.
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Re: Underseal

Postby logsplitterman » Mon Jun 27, 2011 9:58 am

Many thanks to the above three members, your advice is appreciated.
Alan.
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Re: Underseal

Postby droopsnoot » Tue Jun 28, 2011 9:05 am

I've been using a heat gun to warm up the underseal on mine, it scrapes off very easily after that. I'm only using it on the low setting, not on "boil" mode. It doesn't seem to be affecting the paint that's underneath the underseal so if you're careful that might speed things up. As they say, "check on an unobtrusive area first".
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Re: Underseal

Postby logsplitterman » Wed Jun 29, 2011 3:02 pm

Thanks for that.
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Re: Underseal

Postby GTpete » Thu Aug 30, 2012 8:09 pm

Hot air gun, then use paraffin, cheaper than thinners......then light sand and paint with bonda primer which contains zinc. :D
Last edited by GTpete on Fri Jun 14, 2013 8:22 am, edited 1 time in total.
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Re: Underseal

Postby fistfullofV5's » Fri Aug 31, 2012 12:09 am

GTpete wrote:Hot air gun, then use paraffin, cheaper than thinners......

Ditto the above,works a treat. I spray the paraffin on with a garden trigger spray then wipe off the residue with a rag.
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