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Hey everyone, I've run into an issue with white spots and some discoloration showing up after I do a coat of Ard Coat and a coat of Lahmian Medium on some of my models. You can see the white Mark's under the gems on the shield. The discoloration is towards the bottom of the shield having multiple shades of grey now. It doesn't happen on all of the models. Am I just using too much Lahmian Medium? Thanks for the help!

Acrylics tend to be less prone to cracking since it is essentially plastic and is meant to be flexible.

I have seen causes listed as follows:
- Applied too thick.
- Dried in a cold environment.
- Dried in a too hot environment.
- Watered down too much and not enough binder (matt medium added fixes this).
- Not enough drying time and two different brands / formulations of paint intermix (in an incompatible way).

I would say looking at the picture it is a combination of too thick (a run under the gem) and watered down too much.
The final bit may be the top layer was applied before the previous layer had a chance to dry.

There appears to be a bit of unevenness to the surface, it probably could have used a good fine grit sanding and cleaning.
You can still recover this reasonably by giving it a very light sanding and wash over it again (with a bit more medium).

I honestly think it will turn out better than planned with the sanding of the blast shield.

This is my best guess from the evidence I see here.
Looked really good painting so-far, I think it can be recovered reasonably well.

I would also add uneven mixture in the medium.

If you used it straight from the pot, I'd suggest transferring it to a palette and give it a good swirling before using.

I've noticed that lamian medium dries into gel-like gunk, so avoid letting it pool and spread it evenly as possible. 'Ardcoat and Lamian medium and other top coats should be used like glazes and not like washes.

I used both Ard Coat and Lahmian Medium straight from the pot. I try to give the pots a good shake every few minutes to keep from pooling, as well as rinsing my brush to keep it from getting gunked up. I'll try to be a bit more careful with dry times and the amount I put on to the model, and see how that works. My room is usually in the low 70s so I doubt it was the temperature. Thank for the help!