  Spectral variability offers a new technique to identify small scale
structures from scintillation, as well as determining the absorption mechanism
for peaked-spectrum (PS) radio sources. In this paper, we present very long
baseline interferometry (VLBI) imaging using the Long Baseline Array (LBA) of
two PS sources, MRC0225-065 and PMNJ0322-4820, identified as spectrally
variable from observations with the Murchison Widefield Array (MWA). We compare
expected milliarcsecond structures based on the detected spectral variability
with direct LBA imaging. We find MRC0225-065 is resolved into three components,
a bright core and two fainter lobes, roughly 430pc projected separation. A
comprehensive analysis of the magnetic field, host galaxy properties, and
spectral analysis implies that MRC0225-065 is a young radio source with recent
jet activity over the last 10^2-10^3years. We find PMNJ0322-4820 is unresolved
on milliarcsecond scales. We conclude PMNJ0322-4820 is a blazar with flaring
activity detected in 2014 with the MWA. We use spectral variability to predict
morphology and find these predictions consistent with the structures revealed
by our LBA images.
