I shot the entire engine bay of a 67mustang Friday night. The prep was done properly and for the most part the job came out great but a few things are bothering me. I took a closer peek at my work today and there is no orange peel or runs which is a good sign. The satin black is smooth to the touch except a few areas the paint feels a little rough as if there is rough overspray or something. I want to know why this happend and what technique i need to pratice to avoicd this. I sprayed my base layer thin then waited 30 m,in to do a semi wet second coat, waited another 30 min and the 3rd coat was perfectly wet from the left to the right which is confusing me how i got two dry spots on the aprons when the coat was comsistantly wet I used my Devilbis fimishline mini spray gun with the 1mm tip and needle. It seemed to make sense to use the smaller gun as painting in tight comfines isnt easy. I used a single stage Sherwin williams urethane black, with reducer at a 4:1:1 ratio Psi at the regulator on the gun was around 25 Since it was so hard to spray in the tight area i am thinking this caused me to eighter go to fast or do something wrong. Aesthetically the job looks perfect to me and the guys but it bothers me that two areas feel rough. I took some light compound to those two areas and it does seem to help a little,but i am up to fix this if possible but blending single stage paint might not be so easy and i certainly dont know how to do it. So im looking to get some advice, tips and possible fixes for this rough dry feeling.
Sometimes if you don't have enough fan draw the overspray will fall back down on the job and create a rough finish but that would be all over your job not Just in spots is that maybe what happened?
When painting in such areas which can hold dust and or dirt this could happen, also could have been overspray from painting from many angles to get the coverage. The only technique is wet on wet which sounds like you did but when spraying at many differant angles this could be the result. It's a challange painting in smaller areas, once your engine and all the other parts are installed I would'nt see the problem!
not sanded enough so you got a rough spot that absorbed paint skuff pads are the best for areas like that and whey you got dusty fingers feel and check for having smoothe painting areas gun adjustment sure can be a problem and it is way more of a problem with the new guns so having correct air pressure is essential
Unless you were working in very hot temps with a very fast reducer, any overspray should have been absorbed back into the paint. It would dull the finish slightly, but shouldn't "feel" rough. I'm guessing there was something there you didn't get sanded smooth or you blew some debris back out into the paint. Check with your paint manufactorer/dealer before you start sanding and polishing. Some single stages need up to 6 weeks to let the vapors out. If it's just an overspray issue, you should be able to polish it out, otherwise sanding and repainting is probably going to be the cure.
It is very hard to spray single stage out of a 1.1 you need at the most a 1.3 to a 1.4 sure low air pressure,slower solvent and moving slow might help but seing it is like getting a hair cut over the phone. Give it about 72 hours sand it with some 800 and respray it you should be fine. Gun distance plays a big part in this as well.
What he said. I never use less than 1.4,most of the time I use 1.6.We adjust the paint with the solvent,slower,faster or more or less solvent.
well i am redoing this job tonight im just not happy but the thing is paint is damn expensive so its hard for me to get good practice with this stuff i stopped over at a body shop earlier and spoke to the painter and he also agrees the 1.1 tip was a bad idea and i should use the larger gun with the 1.3. he stopped over and set the gun up for me and told me with the larger gun use 18-20psi he also said it appeared to be bad overspray and the angles making this a tough job for a novice like myself. i scuffed the entire engine bay well and prepsol. i now need to remask a few spots and prepsol again then paint. keep my fingers crossed here guys. il post some photos when im done.
The Jalopy Journal
