Re-paint

[Trev]

Can you paint over the top of a 2k paint job with acrilic paint?

The reason I ask is while washing my car on the weekend I found a few rust bubbles coming through in various spots .
Just planing ahead for what to do after getting the wagon on the road First (don't need 2 cars not going at once ), Trev .

[retro]

trev, rub it back with wet and dry 400 grit, apply and acrylic undercoat to seal, and go ahead and spray. I did it to rosie and have done some repairs on a few cars the same way.

The rule is that you can spray acrylic over enamel, but you cant do it the other way. I also find that you have a better chance of paint a small section with acrylic, if you dont want to paint the whole panel, but, atleast clear the whole panel.

If you are spraying the metalic finish again, id advise that you paint an clear coat over top.

Good luck.

[FB Cruiser]

Gday Trev, I have found that to do touch ups with acrilic is ok over 2Pac, just be careful and don't try and make the repaint to wet straight away when spraying, as this can cause the solvents in the paint to bleed under the top coat and cause a paint fry( a blistering and lifting of the paint underneath) this just causes headaches and is a pain. Allow at least 10 mins between coat ( longer on a cold day) call if you need a hand. Cheers PAT

[rosco]

Hi Trev,
got me on the ropes this time old friend..............
Have absolutely no input to offer - never done it, but willing to try.
I love acrylic as everyone knows, I am extremely concerned working with 2K - I am planning on a retirement of years, not months.................

sorry,
out for the count this time...................

frats,
Rosco

[Trev]

Thanks for the reply, Retro and Pat, just what I was after pretty much a simple yes or no and a couple of tips on how to do it .
Pat, I recon when time comes I'll take you up on that offer .
Rosco, maybe next time, thanks anyway , Trev .

[mattymartin]

hey rosco,

what do you mean...

I am extremely concerned working with 2K - I am planning on a retirement of years, not months.................

as my car is going to be painted in 2pak... should i be worried


thanks
matty martin

[rosco]

Hi Matty,
my research with my paint supplier some years back revealed that there is ISO-CYANATE in the product they were marketing - I don't know if this is still the case - if so, and you are going to spray it - you must wear a fully enclosed suit with "supplied air" for respiration - cyanide builds up in your body........... don't for one moment think that a normal mask can insulate your from this........ it gets in through the pores of your skin and also your eyes........ I did quite a bit of reading.
If you are just going to "one shot" play with this, I don't know - I am not medically qualified, but understand there is still "risk".
If not for yourself, but for your family, neighbours and wildlife - not the scum-bags who drag themselves along our streets and frequent our public transport systems causing grief and mayhem - oops getting political here - sorry folk..............
Matty, do some research before you make a decision.
If someone is going to spray for you with the use of a booth - no problems - the cyanide is only dangerous in a loose or vaporised state.

frats,
Rosco
ps didn't want to delete my opinion of removing the scurge from our society.

[retro]

Sunnytim, thats why i advised him to rub it back a bit (to create a bonding surface), then apply a primer, if spraying over exsisting enamel.

I have a recent celica that we bought with minor panel damage, it was repaired using an acrylic, BUT when the car was later taken to a panel shop to repair a few scratches caused by a drunk driver, the panel beater indicated that mapping may occur on this panel when sprayed in enamel, sure enough a few months later, its there.

Wet coats of acrylic will not only lead to mapping etc, but may also lift nikki because of the thinners content.

I was always told that acrylic is fine when sprayed over a decent surface, and if you wanted to go the other way, a sealant must be applied. Ive always sprayed acrylic and never had many dramas. I guess ive always been comfortable with this type of paint, and have never tried the enamel.

Hey matty, i think rosco was refering to the spaying process of enamel, ie the paint dust and fumes, and yes proper protection should really be worn no matter what you apply. Once dry and on the car, you dont need to be scared if your not going to spray it yourself.

Sunnytim, what would be the process of using enamel, does it vary much to the acrylic method, is it easier? cost effective? time saving? and do i apply similar to acrylic? Im interested to know, as im about to start a resto on an fj and will consider this option.

[ek61]

yeh you can spray it over 2k i just resprayed mine in acrylic over the front pannels that were done in 2k
and i always use 2k primers and puttys on my jobs and have used acrylic top coats on them and never had any troubles with reactions

[karsten]

i painted a few things years ago with enamel and i wont use it any more not for body work any how it is messy sticky drifts wet for considerable distance and is a pri@k to strip of and stays soft for ages unless you can bake it you can now add hardners to it but its best for door frames in ya house stick to acrilic or 2k for they are far easier

[FB Cruiser]

G'day Karsten, it sounds like you have been spraying jam enamel, Its good for spraying things like trucks and the like but I use automotive 2pac on cars and peices. It can be a pain to get right but when done is much nicer than (Jam) enamel. It does need hardener for cure but has different ones for different applications, (fast,med, slow). I have also found the longer the paint is left to cure, the better the gloss, dont get me wrong I use acrylic a lot and it works well, but 2pac has its place. On a nother note there is Iso free 2 pac avaiable, I have used this at my last job and it allways looked good,well I hope I helped and not confussed anyone, cheers PAT

[rosco]

S'mee again,
It is some 11 years since I have studied the form guide for 2K - the solvent and formula may well have been modified/changed since then.
At the time, my supplier stated in no uncertain terms that I needed fresh air respirator and full body suit - I wrongly posted Iso Cyanide - it should have read Iso Cyanate - I have edited the orignial post.
I was not prepared to consider the stuff - being a back-yarder enthusiast.

Karsten, as it has been pointed out, this stuff is only dangerous prior to curing - it's not a threat once it is on your vehicle and dry.

Enamel - my experience with enamel is that there are two types - house paint type and spraying enamel - I used spraying enamel on my engine/trans diff etc and eventually learned to work the stuff - got a great finish, but very different to acrylic.
I was taught to put a mist coat over it, then leave it for 10 -15 minutes before shooting a heavier final top coat - this worked a treat - It is very difficult to "know" when you have shot enough on without going too far.

One other thing you must consider with enamel - because it takes much longer to dry, it will stick to anything - even clothes on the washing line if the wind takes it that way when you open your garage......... ask me. We have some very appropriate grey/green clothes and linen - just missing the Holden logo.

It is also very important to use a respirator - the stuff will block your nostrils and burn your eyes - others may not have had this........ yet.

Enamel is good if you can shoot it, but acrylic is forgiving - it is a breeze to fix and can be worked to the point of removal as years pass - to keep up that great finish as it ages.......

sorry,
have to type one handed - and to think I just punched out 18 pages on the immobiiser - you'd think I was sick of it by now........... never.

[karsten]

yeah thats what we used a lot of enamel on trucks,and we did call it a jam job its a good paint to hide stuff and i will be useing it under my car as it is great to seal steel cause you can give it a fat coat like you said rosco and yes it will sag if you are to keen, i allways spray it outside on a no wind day as all ya tools get a coat in the shed and mums washing is best left till the day after