Laminating

[Dave.S]

Hi all

I need to do some strengthening with fiberglass but the area is dirty and greasy/oily. What is the best method of cleaning down the area before I start?

Thanks

Dave

[sandpipper]

Hi Dave ive just been doing the very same thing and had to degrease everything on my boat, i tried turps (crap) it just spead the oil and made it worse,then neat petrol on a rag (crap) samd result as before then i bought some engine degreaser from ebay for £8 worked perfect. What i done was i took the pipe of my bilge pump stuck a lenth of garden hose on in place had the pump running and used a paint brush let it dry and it looked as good as new. Oh and ive still got almost a gallon of resin and activator left over and a fair bit of tissue+ mixing buckets thats going to be of no use to me now ive finnished. P.S if you need any tips just ask i was lucky i had an ex MOD laminator showing me the right way . Tony

[scotty]

dave, use acetone! done forget to key up the area before glassing

[squideyebarnes]

Aug 18, 2008 16:33:18 GMT scotty said:

dave, use acetone! done forget to key up the area before glassing

use an angle grinder to do this but make sure you are well protected.
Andy

[Dave.S]

Thanks guys

I have been reading about adding acitone to diesel as it improves performance, fuel consumption and cleans the injectors/pump.
You don't need much,

How Much to Use
Add in tiny amounts from about one part per 5000 to one part per 3000, depending on the vehicle -- just a few ounces per ten gallons of gas. This comes to between 0.0003 % to 0.0025 % acetone maximum or approximately 1/15th of one-percent. Note that is around .78 cc per liter or one ounce per 10 gallons. Not more than three oz. per 10 gallons.

Have a look here: pesn.com/2005/03/17/6900069_Acetone/

All the info you need! And the side effects.

Dave

[sandpipper]

Hi all, scotty sorry if i stand on your toes but i was told never ever let acetone anywhere near resin as it will soften it also when i went and bought the gear to fiberglass my boat i asked about keying the old glass up and the guy said that the resin has got something in it that makes the new resin stick to the old.
Just a comment guys not a pop
Tony

[scotty]

dunno who told you that about acetone mate maybe they meant not to get it on your resin while its going off. having done quite abit of laminating myself i can safely say acetone is the right stuff to use. even if the bloke is right about not needed to key up the area it doesn't do any harm to play it safe and key it up anyway

[squideyebarnes]

Aug 20, 2008 15:39:25 GMT @sandpipper said:

Hi all, scotty sorry if i stand on your toes but i was told never ever let acetone anywhere near resin as it will soften it also when i went and bought the gear to fiberglass my boat i asked about keying the old glass up and the guy said that the resin has got something in it that makes the new resin stick to the old.
Just a comment guys not a pop
Tony

The chemical you mention is cobolt which is in most resins but not all.If you were to glass a new deck and didn't paint this on the ply first it can peel if not keyed well.So best idea is not take the risk and key with grinder and make sure cobolt is in the resin but it wont be no good on its own if the surface has dirt paint or grease.
Andy

[squideyebarnes]

Aug 18, 2008 19:59:58 GMT Dave.S said:

Thanks guys

I have been reading about adding acitone to diesel as it improves performance, fuel consumption and cleans the injectors/pump.
You don't need much,

How Much to Use
Add in tiny amounts from about one part per 5000 to one part per 3000, depending on the vehicle -- just a few ounces per ten gallons of gas. This comes to between 0.0003 % to 0.0025 % acetone maximum or approximately 1/15th of one-percent. Note that is around .78 cc per liter or one ounce per 10 gallons. Not more than three oz. per 10 gallons.

Have a look here: pesn.com/2005/03/17/6900069_Acetone/

All the info you need! And the side effects.

Dave

Hi dave the acetone as an additive looks great on the link if it does what it sais but bit scared to try it myself.One bit I did find that seemed a bit worrying was its banned in thailand as lodas of cars were breaking down.
Andy

[backdraft]

hi dave ive also been told to roughin up the area and then clean of with acetone,
not sure about it in the fuel though!!!!!

[sandpipper]

Hi all, sounds like i may have misunderstood about the acetone, but hey what do i know as it was my first time laminating last week and the weekend small job has turned out to a major 5 week job.
Tony

[wood235]

Acetone is fine to clean up the area and i would always key up with about a 36 grit flexy disc on a 4 or 4 1/2 inch grinder. The resin will stick without a key but nowhere near as good as a roughened up surface.