Ok so I got this bright idea that I just needed to paint my 40 in laquer. So Im trying to get the firewall painted so I can get the engine dropped in this week. I prep the firewall knocked it down to bare metal. I went over it with an 80 grit disk on my DA, so the metal being to smooth shouldnt be the problem. Any way my primer is popping off in pretty good hunks. What the hell am I doing wrong. Drying to fast? To much thinner? Any help would be great.
What kinda primer? First I would have hit it 150 and probably 320 before I primed.If its bare metal its better to light cover first with acid or wash primer.Did you wash down the firewall with some kinda prepsol or wax and grease remover?Dont ever use red shop rags because the always contain grease and silicone soaked in them from the laundry co.Always use alent free paper towel wiper.And I am gonna ask why are you wanting to paint it with laquer?I know its traditional looking but if done right you can use materials from todays standards and acheive a look that is very close but with better lasting results. Shoe
that 80 grit shoulda been fine for prep- I d suspect a dry first coat as the problem,.....spraying laquer for the first time is a different deal from the wet finishes made now....its a common mistake and can be because of the rate of thinner is not enough to thin it properly or air pressure issue.
Yeah I wiped it down with wax and grease remover using disposable blue shop towels. Im using the Hot Rod red oxide laquer primer surfacer. And the reason is ...well i dont have a good reason just wanted too on this one. And after the hell I went through to find the paint Im not turning back now. Thanks for the acid etching primer idea, hell Im just learning as I go along. Air pressure was set 60lbs the second time around. I did have a pretty dry coat the first go around, its when i layed on the heavy coat is when it lifted.
The problem is that you didnt post update pics here like you did.............ahem..........on some OTHER board~!~~~~!!!!
Screw that new shit Troy- throw that cleanup solvent out and wipe firewall off clean with some laquer thinner to remove THAT oily shit...then mix the Laquer primer about 1-to-1 with laquer thinner and spray on your first coat GoodNWET ....
Trent I didnt think anyone over here would be interested in just another 40 coupe. Kenny thanks Ill get right on that in the morning after I....er well fix it again.
Bout 30lbs outta do it.Thats cool if your using laquer.Just remember heat and the elements effect laquer.Ah the days of thirty coats of hand rubbed laquer and then having to buff it up all the time to keep it shinny.I agree with tman on the 80, but always take my stuff way down smooth.Also I dont remember red oxide having any kinda filling capabilities so the more prep you do the better its gonna look.Man its been 20 years since I used any laquer primers hell the only thing we use laquer thinner for now is to clean the guns.LOl Shoe
Did you guys get a Tornado tonite? We got strong winds and 4" rain last evening and 5-6" this afternoon!
No sirens went off but it got pretty nasty there for a while. Shoe the primer I am using actually filled the sanding scratches in real good...except for the fact that it wouldnt stick in some places Im pretty happy with the way it layed down.
you didnt mention it,,but i figured i'd throw it out anyways... if you take a wire wheel (on a hand grinder)to the surface and DONT at least scuff or use a metal prep,, it does something and neither body filler or primer wont stick,, ....,if mixed properly,primer should stick with anything from 36-600 grit(or even finer for that matter) with no problems. the only other time ive seen primer peel off is when you throw a heat lamp on it.. (well of course if you dont let it dry long enough,,but if MO is anything like KY has been the past week,,im sure you have NO problem with anything drying!) wha
AMEN,,thats another thing i didnt take into consideration,,i asummed you were using an epoxy..my bad! like donnie said, if its bare metal ,you better use EPOXY!
Ok Ive got some Transtar 6114 self etching primer. Would that work under the laquer primer without freaking out. I had the understanding that laquer based paints dont react well with others.
You dry sprayed the primer &/or used too fast a thinner - I'm betting both. Use epoxy! It will last ten times longer & with all the work you're putting into your car you really don't want to have to re-do in a few years. Only use the laquer if you like completely rebuilding your car every few years. Personally if I was going to do that I'd build another one instead. 180 is a good grit to smooth out metal before priming, & stay away from those blue "shop towels" - I suspect they contain contaminates. ~ Paul aka "Tha Driver" If you can't take the heat, get out of the nuclear reactor.
laquer will not hold up if you put too much matrial on. how many coats ? how much flash time? what size tip in the gun ? any one can read a magizine on how to paint your car at home and still have it look that way. Talk to any good body guy and you will learn about mill thickness and what works with what.
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