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Paint Adhesion Problem's
8 replies to this topic
Posted 24 April 2007 - 12:41 PM
I've recently made the jump from rattle cans to using an airbrush,the fist of undoubtably many problem's i'll encounter is this,i've noticed when shooting my base coat small patches that when dry crack and don't stick to the lure,is this because i'm shooting to thick a coat in certain areas of the lure?or is it an issue with the lure body?
I'm making lures out of beech/meranti sealing with sanding sealer,i then spray over using a rattlecan acrylic undercoat(i was thinking it may help bond the paint to the lure)then spraying the basecoat using medea opaque airbrush paint's
Posted 24 April 2007 - 01:18 PM
If your undercoat is thoroughly dry, spraying your paint too thick could certainly cause the cracking in small areas as you describe, especially since you suspect you're spraying too thick.
Posted 24 April 2007 - 01:57 PM
Yep, thick acrylic coating can crack, especially if dried quickly by a hair dryer. I shoot a white color basecoat directly over my waterproofing coat and then colors. JMHO, it's best to keep things simple. Adding other intermediate coatings or non-acrylic layers increases the possibility of having 2 layers of non-compatible chemistry wrinkle the paint job or fail to adhere properly.
Posted 24 April 2007 - 02:45 PM
Thank's Guys,i haven't sprayed massively thick but i guess a fraction too thick in small areas which has caused the problem,i thought the additional undercoat may help it adhere but it's happened with and without this layer so it looks as if the problem is the thickness of the coat
Posted 24 April 2007 - 07:21 PM
BEZYB: Beside all the reasons mentioned-If your base coat is in any way glossy (should be matt) you will have trouble getting your colours to stick- when the colour dries it shrinks a tiny bit and if not adhering properly, tends to crack. Also, I think this was mentioned- The base coat should be totally dry, if not it will shrink on drying and drag and crack anything that is sprayed over it, a bit like a micro version of "crackle finish". hope this helps.Pete
Posted 24 April 2007 - 08:18 PM
Why are you making the switch to an airbrush? I just went to your link and your rattle can stuff is great! I'm just curious.
Posted 24 April 2007 - 09:54 PM
try doing away with the undercoat and shoot with a white sandable primer like painters choice.
Posted 25 April 2007 - 12:42 AM
Hazmail-the basecoat is a matt finish but i'll keep in mind about the drying times,thanks
Waterlogged-Thank's, i'm hopeing the airbrush will eventually give me more flexability with colours and shading and hopefully improve my bait's.i can make,weight and topcoat the lures but i feel the paint could be improved so that's what i'm trying to do
Posted 25 April 2007 - 10:26 PM
Hi!I add my share of problems with paint adhesion in the past!!!My problem was that my base coat primer was to dry!!??I use createx autoair paint and I was told that the primer coat add to be put on about 15 min. before spraying the first coat of paint!!!Curiously!!!It work's!!!So...It allways depend on what kind of paint that you are using!