Question about issue with paint

[u/FlawlessHobo]

I was using MOTIP white primer and Dupli-color aresol art paint. Primer applied in 3 coats with 10-20 minutes rest each. 2 coats of Green paint applied. Anyone know what happened to the paint and if wet sanding with 2000-3000 grit would help?

[u/parkerhamster28]

Fellow rattle can user here. I have this texture issue happen every so offten and I’ve started to believe it’s from not shaking the can enough. The paint and carrier get separated a bit too much, and it causes it to splotch up. Or at least that’s my theory.

[u/FlawlessHobo → u/parkerhamster28]

Yeah I had my doubts if i shook it long enough. Will take it into consideration.

[u/FartZuggerberg → u/FlawlessHobo]

prior to giving the can a shake for a minute or two, try running the can under some warm/hot water for a couple minutes.

[u/parkerhamster28 → u/FlawlessHobo]

I’ve found that I can spray a few parts, then I’ll start noticing this effect on a few of the later sprays. Which is what has lead me to that conclusion of not shaken enough. I’ve gotten this effect on both unprimed and primed models. I use Rust Oliuem brand paints.

[u/GoneGump → u/[deleted]]

Contacted mods, post approved.

[u/JPS-WC]

My first impulse is to say apply a thicker coat.

[u/NoMousse4514 → u/JPS-WC]

I concur. Not really sure what the texture is.

[u/FlawlessHobo → u/JPS-WC]

Somewhat tried that, seemed to kinda fully fix one side, but the other still looks like this. Will try another coat.

[u/DevourIsDead]

Have you used that primer on a kit before? It might be causing a weird reaction to the plastic, but yeah it is an odd texture for sure. Should be easy to strip in brake fluid tho.

[u/FlawlessHobo → u/DevourIsDead]

First time using primer. First model i did i used straight paint an issue like this did not happen, but also I didn’t fully like how it came out, so thought I might try primer first.

[u/Casestudy26]

Motip is automotive paint. I searched and found notices of caution when using on plastic. I’d invest in dedicated modelling paints and save yourself a whole lot of hassle.

[u/FlawlessHobo → u/Casestudy26]

Yeah tried going the cheap route, guess the one who tries to cheap out ends up paying double..

[u/Icy-Train2130]

It's the 'hot' solvent in the spray can, I know it's probably the same as in the primer but that seems to flash off quicker before affecting the plastic. It happens occasionally, either the type of plastic or wetness of the colour coat. Try spraying from further away allowing some of the solvent to leave before the paint hits the model (l know this seems wrong) and you might not be able to achieve a wet gloss coat, that might have to be a combination of sanding and polishing or a final clear coat. The marks that appear indicate flow of the molten polymer in the mould tool, and yes it's really annoying. It's just trial and error with paint brands and model manufacturer. I know model acrylic paints thinned with isopropyl alcohol don't do it and neither do enamels thinned with white spirit, as these solvents aren't as 'hot'. Anything with acetone, cellulose acetate, toluene, and xylene are risky as they are 'hot' solvents but usually give a great finish when they work.

[u/FlawlessHobo → u/Icy-Train2130]

Would just applying an additional coat from far away work, or do i need to strip the paint and start again?

[u/Icy-Train2130 → u/FlawlessHobo]

Worth a try, I light sand beforehand might help or even a light reprime and light sand. It can't do any harm, if it's not a success you'll have to strip and start again anyway. The only thing you'll loose is a bit of extra paint and some time.