Guide coat question

[stanclub]

sorry that I have been asking a lot of questions .........

For guide coat, which one is preferred? Dry powder or spray aerosol can?
Is dry powder more economical and cost effect than spray aerosol?
Is Mirka dry guide coat any good? How does it compare to more expensive 3M?


Thanks for the help!

[Len]

sorry that I have been asking a lot of questions .........

For guide coat, which one is preferred? Dry powder or spray aerosol can?
Is dry powder more economical and cost effect than spray aerosol?
Is Mirka dry guide coat any good? How does it compare to more expensive 3M?


Thanks for the help!

It depends on what part of the job you're working on.... When working on body fillers where you are block and board sanding dry I'd recommend using the dry powder and spread it on over and over again as you work so that you can continuously see your progress. When wet sanding primer it's best to use an aerosol guide coat because you usually only need one application per coat of primer. If you use the dry when wet sanding it can wash off and become muddy and if you use the aerosol for filler you'll need to apply it several times and you'll create overspray and fumes that may not be the healthy.


http://autobodystore.net/Merchant2/graphics/00000001/3m5861.jpg (http://autobodystore.net/Merchant2/merchant.mvc?Screen=PROD&Product_Code=3M5861&Category_Code=FM)

http://autobodystore.net/Merchant2/graphics/00000001/sem38203.jpg (http://autobodystore.net/Merchant2/merchant.mvc?Screen=PROD&Product_Code=SEM38203a&Category_Code=FM)

[7tonemonte]

I typically keep some cheapo Home Depot brand black around for use over primer, its like 97 cents a can,and about the only thing its good for is guide coat!
As for the body filler, I like to use the powder that Len posted

[Len]

I typically keep some cheapo Home Depot brand black around for use over primer, its like 97 cents a can,and about the only thing its good for is guide coat!
As for the body filler, I like to use the powder that Len posted

The only reason I find the dedicated "guide coat" better than canned paint is that the paint is thicker even when it's dusted on and it can cause problems sanding or even when paint is applied if there's any left. The SEM paint is very thin and deposits almost nothing on the surface.