Author Topic: painting / primeing bare shell hints, tips , suggestions  (Read 1771 times)

Offline danny_p

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about to make a restart on my project golf. looking for a bit of advise on best paint system's to use on it

Basicly  all the underseal is now removed and i will be shotblasting the shell in the next week or two back to bare metal on the underside and in the enine bay and inside, and anywhere there is any sign of rust ( i'll try keep away fromt he roof pannel so not to distort it )

the car is going to built for track days and a littel competive motorsport ( hence all the under seal leaveing )

this bit of the project will be the intrestign and challenging bit for me as paint is somethign i've allways being scared of but going to have a go anyway.  so what products or type of products would be best suited for bare metal.

from what i've read i'll need to etch prime everything i've blasted.   ( any recomended etch primers ?? )

then a 2k primer over that lot.  ( again any ecomendations ???  )

then sadly as i'm not going to be abel to finish the whole project in one hit i can't leave in in just primer for to long so would i be right in thinking that coverign the lot in something like a white 2k would keep it all good while  i put the cage in and sort various odds and sods out  thinking it will be easy to patch in.  then once done  use something like upol gravitex on the underside to help protect it against the kitty litter.

then at some point when it looks liek a car again 1K base and 2 K lacker the outside in a nice blue or something :)

any input appreciated

danny
all the VW's have gone bar 1.

Offline Thom89

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Re: painting / primeing bare shell hints, tips , suggestions
« Reply #1 on: 12 January 2013, 01:22 »
Danny, sorry, I missed this! also surprised that no one else has picked it up!
Is you car on a spit?
Logistics for this type of project are as important as the hard graft itself, you also need a plan where you can walk away from the car for a few weeks should you get pissed with working on it, but without work that you've done, deteriorating!
So not knowing where you are at this stage, I'll assume that you've not yet etched or primed the car...

Once a panel area has been stripped to bare metal, its very important to get it covered up, with at least etch primer ASAP, bare metal is porous, and will draw water from the atmosphere almost immediately, this will cause problems with the paint micro blistering in the future... So, strip a panel, then etch it, move onto the next an so on...
Bodywork can easily be done after etch, so don't worry too much about dents and welding at this stage...

Dents etc can be dealt with by sanding back the etch with 80grt and repairing as normal, re etch repaired area, then 4 or 5 coats of a decent high build 2K primer, again, the quicker you get the panels in primer, the better

Underside of the shell... Long experience has taught me not to use anything other than Satin Black 2k Topcoat, Kitty litter rips anything else to shreds, some race tracks are worse than others! depending on the shape of the stones... seriously!  Just using paint keeps weight to a minimum, and is as easy as it gets to repair, we tend to let the car go for a few seasons before a refurb,
All suspension components should be powder coated satin black, and not painted...

Again, not knowing what stage you are now at...
Interior should be primed asap, as should the roll cage prior to fitting... Primer should be close in colour to whatever colour you're going to paint the interior, ie,white interior, use a white or light grey primer,
Black interior, use a dark grey primer, with a bit of black paint mixed in, this will help massively with the coverage, and again, help keep the weight down
Roll cage should then be welded in after primer, local repairs carried out on the burnt areas, then painted the colour of choice after
Double mask the interior before commencing with the work on the rest of the exterior paintwork

Max Meyer primers are VERY good, and easy to use, including the etch...
Get 2 ltrs of etch, and 2 ltrs of activator, mix 1 to 1, use zero thinner! also discard etch that has been mixed for more than a few hours, as it loses its strength

Get 3ltrs of Primer, and 2 ltrs of Hadner for the primer, Mix 2 to 1 + a dash of thinner per 500ml mixed, less or zero thinner if the workshop is cold

Hope this little lot gets you on your way, let me know if theirs anything I've not covered for the "into" primer stage

Thom

Offline danny_p

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Re: painting / primeing bare shell hints, tips , suggestions
« Reply #2 on: 12 January 2013, 11:46 »
car will back on a spit shortly. also arranged a corner of a barn to put it when i get to pissed off with it  this part is what went badly wrong last time had no choice but kick it outside  :sad:   hence haveing to shot blast rather a lot more of it.

youve highlighted what i thougt may be the problem with preping the shell. gone about some of it the wrong way really atm  but i'll get it blasted off and etched then finish the welding.   good point about the rollcage  never thought of painting it prior to installing it makes sense tho  as i rember DH saying his was a twerp to get at to paint.

as for the underside.   i was going to put it all white but will bear in mind what you have said about the satin black 2k topcoat.  and ill go and see the new outfit that started powder coating localy ( the other lot were sub optimal)

thanks for the pointers thom 


 
all the VW's have gone bar 1.

Offline Thom89

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Re: painting / primeing bare shell hints, tips , suggestions
« Reply #3 on: 12 January 2013, 13:44 »
No problem Danny
Painting the underside white is not a problem, just pointing out that its better finished in a painted format, rather than stonchip and paint... either way it all comes off when you decide to blend in with the scenery!!!

Did DH really say Twerp :grin:

Thom

Offline danny_p

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Re: painting / primeing bare shell hints, tips , suggestions
« Reply #4 on: 12 January 2013, 19:06 »
might try a bit of stone chip ontop of paint to protect it from road dirt then,  fully expecting to have to redo it all if go for a bit of an off road excursion, we'll see what happens

DH din't really say twerp  more allong the lines of f**king thingying bastard, chuff also has simlar view of painting cages
all the VW's have gone bar 1.

Offline JC

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Re: painting / primeing bare shell hints, tips , suggestions
« Reply #5 on: 12 January 2013, 19:08 »
 :grin: ..........................  :lipsrsealed: